Mr. Mark , you are spending a lot of time just to give us really valuable information, for nothing in return, thank you so much , I'm one of your students from Saudi and I'd like appreciate you , thank you so much ,,, much love & respect to you and your team.

Mark- great job as always. I have the set up you are using in the video. Retro fit flow control on the Profitec 500. For those folks who don’t want or can’t get a flow control retro fit there is another simple option. I can reproduce what you refer to as the “sweet” shot without flow control. I start the flow until the pressure reaches about 2 Barr and abruptly shut off the flow. I then wait 5-10 seconds depending on the age of the coffee and then re-establish full flow. After about 80 % of the desired volume I drop the lever so that there is gravity flow only. This corresponds to the transition from tiger striping to blonding. I would argue that the result is indistinguishable from using flow control. Thanks Pete

Brilliant! That was so informative - I picked up heaps of tips. Really appreciate WLL's efforts. I'm learning lots.

Health an happiness to you and the whole team Marc!

Excellent point about not opening flow valve all the way for a regular shot. I struggled with it and after video i turned mine 1 1/4 turns and it made a huge difference. Dont know why i never thought of it before

Hey Marc, great videos and info especially the FCD stuff. Ive learnt a lot during the lockdown so all good here in the UK. Stock flow on my ECM Synchronika was 13.2g/sec and static pressure with blind basket is 9 bar so I can see why I was having problems pulling good shots even when watching tons of stuff on KZfaq. Seems that from machine to machine this differs somewhat due to manufacturing tolerances so its a no brainer that all machines should have a FCD from stock. Otherwise all the videos and tutorials worldwide on pulling shots is null and void because those guys without the FCD have no flow standard to work to. Temps and grind is so variable when the flows uncontrollable. With my plumbed in ECM at 2bar static inlet pressure I have been recently just dialing in the grind/shot nicely with 1 1/4 turn (11.3 g/sec). My stock flow was 13.2 g/sec which i think was way too much especially when my friends machines vary between 8.5-12 g/sec. Once Ive dialed it into 1:2 ratio in around 30sec then I start to play with the FCD and I find 1/4 turn increments are way too coarse. I would say 1/16-1/18 of a turn increments is where its at.. If the FCD could be manufactured so that everything could be done within 1 turn it would be soooo much easier to remember where you are on setting when your under pressure pulling and monitoring the shot. Great videos and long may it continue..Rich, Uk

Thank for the video Mark! Highly appreciated!

Great information. Thanks for all the work involved with doing these videos. I just purchased from Whole latte a Profitec 600 w/ flow control. I am waiting for delivery. Your videos were a big part of my decision to purchase from you.

This is a terrific tutorial on flow control, THANK YOU. Ordering a scale now. I pulled the trigger on the Profitec 400 from Whole Latte Love w/ flow control. Sacrificed PID on this model BUT trade off was flow control. After research I liked flow control as a fine control for better shots IF pressed and had to choose one, i.e. a unit w/ either PID or flow control but NOT both. Delivery later this week, will get w/ the crew if I have question about my Profitec 400 w/ flow control.

That opens up the possibilities of control and taste preferences, the IMF screen is a must have also.

Man I really want to take the jump and buy an espresso machine after watching your videos! 😋

Love the machine I'm glad I listened to your advice

Hi Marc, I forgot to mention that when I fitted the FCD to my Synchronika, I swapped the spring as instructed. I'm using the tank so I know now the spring swap wasn't necessary. However, one annoying thing that the Synchronika did before the FCD installation was spit into the tray after dropping the lever at the end of pulling a shot making a bit of a mess. The FCD with the new spring reduced this to a dribble. I'm not sure this was an intended fix but I'm happy it does this. My machine is easier to keep clean now👍

Hi Marc, great video as always. I enjoy watching your reviews in particular, you always give great detail and keep everyone engaged. You’ll have to do an outtakes video and show that shower screen flow from below again, due to the camera malfunction not switching. My question, I think you mentioned in another video that the flow control might be made available on other machines, any news if they will be coming for Rocket Cronometro machines? Keep up the great work!

thank u for recording this!!!

Great content as always and particularly in times like this. I'll go practice on my ECM classika (courtesy of Whole Latte Love)

When adjusting the flow rate does that also adjust the brew pressure or the pressure somehow stays the same as long as the coffee provides enough resistance? Any differences between using an actual lever machine and simulating the lever machine?

Your healthy hand tremor is proof you are a true coffee freak, I'm sold!

man this is good content, thanks mate!

I am hoping for the day when ECM and Bezzera and others implement programmable flow (or pressure) control! it seems challenging to do all this for a milk drink!

Hi Marc, I have a question about the long-term durability of the needle valve. From what I understand, it's akin to putting your thumb over the opening of a garden hose to restrict flow. With the pump running at full 9 bar all the time throughout the shot (which would take up to 60 seconds with super low-flow preinfusion), there's going to be a lot of pressure looking for an escape. Could this backlog of pressure cause accelerated wear on the plumbing?

Love whole latte love. Marc I wish your website would allow international shopping one day

Hi, Is it reliable to get this machine with a flow control? I’m more focused on normal espresso shots but gonna use the flow rate occasionally to do some drips. Im afraid that the stock flow rate is not doable and sustainable in this machine. What are your thoughts.

Hi Marc, I'm enjoying your shelter-in-place videos! I'm considering getting a PP 500 PID with flow control. I'm wondering if using a low flow rate on a HX machine will increase brew temp due to coffee staying in the group for a longer amount of time. Have you made any measurements of this?

Hi Marc, I bought the flow rate kit and and installed it. It comes with the spring replacement. After replacing it on my synchronika, I find it tougher to pull the lever. What is the purpose of the spring and do I need to replace it? Thanks

great job mark!

This was great! Question, is there any kind of repository for different flow profiles? It would be helpful to have some standardized profiles to work on at home. Thanks!

Hey Marc, Thank you so much. It’s been a while no see! I hope you’re doing well. Does the stock rate for v pump a turn and a quarter turn as well? Specifically for Calssica pif. Thank you.

I have a lock on Bella grinder in m6s I'm having a hard time getting the grind right it comes out alright at 1 and 3/4

Love the videos, thank you!! Can you tell me what the stock flow rate for an ECM Synchronika might be?

Love this! I am thinking of getting three for my Kees Van Dee Western Mirage then it will look even sexier hehehe question how come you don't purge water out between shots? Is it just for the sake of the video or you don't feel the need to purge the old water and grinds??

Hi Marc - Great video! I have learned a lot watching bunch of your videos. I just pulled the trigger on Profitec Pro 600 with Flow Control from WLL. Can you advise how the Pro 600 Flow Control can be used like the stock Pro 600? Does it also take one full and quarter turn to get the same flow as the stock Pro 600? What is the flow rate of a stock pro 600? What are the negatives if you are brewing with much higher flow rate? Thank you.

Hi Marc, thanks for all your info and videos, your help is very much appreciated, Regarding Orchestrale Nota 1, have you ever used them, and if so what is your opinion, as I am about to upgrade from my Breville dual boiler to a "real" commercial machine.

Hi mark, awesome video! I have a profitec pro 700 and these are my flow rates 1 x 11ml/s 3/4 x 8.8 ml/s 1/2 x 6.6ml/s 1/4 x 4.5ml/s They seem to be a bit higher than yours No water comes out when fully closed as well Thanks Nicholas

What is the standard flow rate for a vibration pump,like the Pro 600? Thanks

Thank You Marc, i am also experimenting with my Lelit Bianca, I used to have a Speedster and in combinatie with my e37s i am also getting interesting results. However i compare This with one of my old machines, Faema president and i thinkwe are just treingebruikers to get the same profile. Thanks again i like your video’s veru much! Last question How are you?

Hey Marc! I'm interested in installing a brew pressure gauge on the E61 grouphead of my Quickmill Andreja. Question- I see lots of options on the market for E61 pressure gauges, as well as E61 grouphead thermometers. Does any company produce a 2-in-1 gauge, that can measure both simultaneously? Thanks a bunch!

Is the flow control on the ECM Classika a good machine for home use. Will make 2-4 espresso a day with half to include milk frothing?

Thank you so much for the wonderful video. Do you need to have the pressure gauge installed? Can you just use the flow control and a thermometer?

Hi! I really like your videos, they are really helpful! I also bought a Ceado E36S grinder and I see you adjusting the grind size while the burrs are not turning. Is this hurting the machine based on your experience? The ceado manueal recommends only to reduce the grind size while there are no beans in the machine and the machine is running. What is your take on this? Kind Regards!

Marc, are those or other sample profile graphs or charts downloadable anywhere? I have watched your video on the 5 profiles which was a great help but I've just got the FCD and to speed up my experimenting I'd like to try successful or proven various profiles that you or others have tried. That would be a great starting point for a beginner to profiling. Oops! I just saw the same question was asked below. Sorry!

Hey Marc, I just picked up the Profitec Pro 500 PID with the flow control. You did mention that the Pro 700’s stock flow is 1 and 1/4th turn, is this the same for the Pro 500? I just want to get the stock flow first to dial in my grind before I start going into the deep end with the flow. :D

When the flow rate is restricted, where does that extra water go? How's it work and is there any potential side effects of adding a flow rate control mod?

This may have been asked before but I'm hoping for your answer. If a machine has flow control is there a constant stream of hot water going to the E61 group head to keep it nice and warm even prior to opening up the flow control lever during the machine warm up period and/or between pulling shots?

Thanks Marc for putting this together as well as the other video with the 5 different profiles. Did you come up with these profiles by trial and error or is there some theory behind it? For example, for dark roasts pre-infuse high flow/low flow, short or long hold duration? Light roasts, old coffee as well. Could you expand on the thinking that lead you to those 5 profiles please?

Hi Marc I look at the site weekly and the flow controls are always out of stock. Any ideas when they will be available. Thanks

Hi Marc, Thanks for your videos. I recently purchased the Profitec 600 with flow control. I have pulled about 50 shots so far and just got my new Caedo E6P grinder so went back to this video before dialing in my grind size. I would think the Profitec 600 flow would be similar to the the 700 in your video, but it takes me 2 full turns open to get about 11 grams per second (222 grams of water in 20 seconds). Is 10.9 grams per second the stock flow on the 600 as well? I called tech support but they did not have an answer for what stock flow should be on the 600.

Hi Marc, is the pressure gauge standard for all E61 head ? so I can install it to either Lelit or Rocket ? thanks

Hello, Do I have to put the spring at the bottom of the unit? Because if I understand correctly, the purpose of the spring is to control the pre-infusion (to remove it so that you can control it yourself). So by leaving the bottom as it was and only changing the top, you keep the pre-infusion? This doesn't seem to make sense, and yet I see an advantage in being able to shoot shots as originally. Of course, Flow Profiling only comes into play after this pre-infusion. Thank you!

I just had another question while I was watching you using flow control. I also bought the ECM Synkronika with Flow control. When I close the flow control all the way up, I still get some water (2-3 g/s) out of the shower screen. Is there a way to adjust the flow control setting if it is already installed? That would be really helpful to be able to maintain and adjust this. Also, is there a way to limit the output (g/s) if it is turned all the way up? It would be great if the standard flow rate (without flow control) would also be the maximum flow rate with flow control installed. Kind Regards!

Hi Marc, love the video’s. I’ve flow control installed on my ECM Technika V for a week now and It’s amazing! But when the machine Is warm, the turning of the valve gets more difficult and not so smooth. Is this a common thing? or is action needed? Thanks from the Netherlands

I don’t see anymore the flow control device sold separately in de WLL website, so if I want to upgrade a machine later, what I can do?

Hey Marc, quick question. I’ve noticed that on most of these FC profiling videos, 1.25 turns seems to yield the stock 11g/s flow. I just purchased a Synchronica w/ FC, and on my machine I’m seeing that 0.25 turns = 1.0 g/s, 0.5 turns = 3.5 g/s, 1 turn = 7.5 g/s, (etc.), and 1.5 turns = stock 11 g/s. Is this additional quarter-turn difference anything that I should be trying to adjust? Or is it perfectly acceptable for there to be some variation like this? Thanks!

I bought a profitec 700 from you however I noticed when you're opening your valve you're turning it clockwise to open it mine you turn it counterclockwise am I missing something

Marc, why have a gauge on brew head if you have one in the machine ?

Hello wholelattelove family! I recently purchased the pro 400 with the flow control and dialed my shots with the flow control fully open ( not quite ready to experiment with the flow control) I guess I need to find the stock flow and match the flow control to that and then dial my shots based on that? Please help, also whats the stock flow for the profitec pro 400. Thank you!

However I wish it would go down finer I'm going to try opening it to a half a turn and then turning it on and see what that does

I have a 58mm double-shot portafilter and just bought a new Baratza Sette 270Wi grinder. My current double-shot portafilter cannot hold the 20g grinds that come out of the grinder - it backs up almost into the grinder itself - so what portafilter basket should I use?

Is the flow control on the Synchronika something WLL installs at your shop after it arrives from ECM or does it come already installed from ECM’s assembly plant (out of the box)?

Hi, I have a question? I have a Rocket Appartement, can I install the flow controller on it?

I just bought the P500 with FC and went though the calibration as shown and even at 2 full rotations I am only getting 9.16 grams per sec. In the video you mentioned that a standard flow rate would be somewhere around 9.5-10 grams per sec. My understanding is that in order to dial in I would need to set the FC to a standard flow rate, is that the correct way to dial in and should I be concerned with the flow rate at all?

Hi, I been using flow control on my R58 for 5 months now. One thing I notice was it wont release pressure after brewing, it stays at 6 bar (on machine gauge). I have to pull the level to pre-infusion position to release the pressure. Whys that, any fix? I had no issue with this before installing the flow control. Thanks,

Can the flow control be used via the tank versus plumbing it in?

Marc, thanks for this! But why is it that on my Pro 500 with FC that even when the valve is fully open (2 revolutions), I'm only getting around 10mL/s?? I've tried with multiple shower screens and I get the same results :P I've never been able to get 30mL/s with a fully open valve. The machine is brand new and got the FC valve pre-installed. What seems to be the issue? Thank you in advance.

I just purchased the ECM Mechanika V slim with flow control from you guys. But because its a HX machine without PID i want to use a E61 grouphead thermometer. Is there any way to use them together? After calibration, can i use the flow control without the grouphead pressure gauge? Thank you

Full open FCD on my Pathfinder measures 7.39 ml. Not quite 11, but is this bad? How can you adjust the get closer to 11?

Brilliant, really enjoyed this video! Well done Marc your a legend! Stay safe!

Hi Marc, what the flow rate for Ecm Technika V Profi PID???

You are doing a great job with this tutorial, all alone! I learn a lot :) /Stay safe!

Is the Ceado dosing funnel available separately.

Can it be attached to any e61 brew head like a Rocket evo R?

Hello Marc, thank you for another great video and tips. I’d like just to ask you one thing… I heard that it’s necessary not to touch the metal parts of the flow control, because it’s damn hot, but you’re touching it without any problems… Can you please just confirm it’s not that hot and it’s ok to touch it? 😇

I just received my flow control for my ecm classika. (I live in eu, i also received an extra spring to be changed, what does it change?)

Hello Marc, Love your show - I recently purchased ECM Synchronika with flow control. Based on your video for 20 seconds your flow control at 1/4 turn is 37.8 ml and my 1/4 is 79 mil. Then your 1/2 turn is 69.4 ml and mine is 139.2 mil for 20 seconds (almost double). My machine is plumbed in, is this normal ? could you please advise as to what would be the perfect flow? Thank you Sunil

Marc is so cool. 'Nuff said

Hi Marc! Again, what a fantastic video - one man show - perfect ;=) For me there is no other guy i know who goes so deep into all the details-around the espresso-universe with so much engagement. A real athlete doesn't stop until the sweat is on his forehead ;=) Do you think possible chennelling (39:40sec) could be forced, when pulling out the Jack-Leveller to fast out of the portafilter (-> vaccum)? I relay like my R91, good flow-control, and my E37ZHero (has by the way a lower portafilter-holder, so that i can lay down my angled portafilter, no need to hold it, so that i have both hands free). I will try your different profiles - it's really fantastic that you do such reviews, thx again! As you said that you like a clean portafilter - have you heard of/tested the pro-fondi portafilter cleaner? Stay healthy Marc, greetings from germany!

Will it fit Isomac Tea?

Hi Marc Can you recommend using Ceado E37S as a single dose grinder? Having a little trouble seeing what else you get with the Ceado E37SD which has a somewhat higher price .. As I sometimes have to use it to run multiple shots in succession Thanks for some great and informative videos )) Sincerely, Morten from Denmark.

I have Flow Control Envy.

Do you have to slurp so loudly?

Just received a Profitec 600 with Flow Control. I’d like to see an intro video that is far less tedious than this for new users. There is no way that either my wife or I are going to go through a repeat of your exercises to learn how to get some good out of this new Flow Control. We need a quick and easy “getting started” lesson to get some good out of it without committing to an endless fiddling exercise.

I'm late to this party; but did he say the ECM guy is named Mike Hawk? XD

there needs to a thermal probe/pressure gage on the group head so we know its temp. it's not rocket science.

PROBLEM: (pet peeves) I've watched all the WLL videos on the this E61 Flow Control device and can''t help but notice in all the videos,.. the color of the chrome finish on the Flow Control valve does NOT match the color of the chrome of the E61 Group head. The valve has a yellow/gold cast to it when compared against the Profitec. Yes the flow control is chrome plated, however, just like the manufacturing process of stainless steel, the color of the chrome finish is determined by the proportion of materials / chemicals used during the plating process. (FYI: For over a decade I was the manager of a chrome plating line in a major US manufacturing plant. We chrome plated everything from automobile parts to home appliances.) Simplified, the more nickel used in the process the whiter or more silver the finish. The more brass or copper used in the process the more yellow or gold the final finish. Like others I don't want the Flow Control to detract from the original appearance of the machine. On closer examination, the other pet peeve is the buffing process used prior to plating these valves which appears to be sub par. Starting around 11:37 - as the camera moves around you can observe the color variation as well as catch glimpses of reflections on the nut of the flow control valve and see it doesn't have the same super smooth highly reflective mirror finish of the Profitec. I should clarify that I'm only referring to the color/finish of the large "tightening" nut only. The chrome finish / color of the valve stem looks great. NET: WLL should meet with the manufacturer of this valve to improve the quality of the finish... or find another manufacturer. Ideally, adding an aftermarket device shouldn't scream "I'm not original to the machine." Does any of this effect the function of this valve? No way! It works exactly as advertised! I only wish the finish looked as beautiful as it works.

Lol actually Mark I watch further on in the video and it I must have been wrong at where you started from because it's working the way mine does your right

The more you tweek on caffeine the more you want to finesse your shots.

I think you drank too much espresso 🤪

you gained some weight, it suits you!

You guys sell those machines for way way too much money.