Measuring compression fittings

Рет қаралды 44,177

Күн бұрын

Have you either had a compression fitting or needed to install one on a copper or aluminum pipe and didn't know how to measure it? It's easy. I explain how to figure the size you need.

Пікірлер: 11

@lisaleidy344 2 жыл бұрын

Thanks, this has been the most informative thing I’ve seen thus far. Trying to install a shutoff valve under my kitchen sink.

@Z14kt12timandjes1 Жыл бұрын

Excellent explanation. Thank you for that.

@jamesprice4074 Жыл бұрын

You're the man! Thanks

@honolulu1476 4 жыл бұрын

Thanks

@johnalbers6422 4 жыл бұрын

Thanks for this. I need to change out several compression water valve shutoffs in the bathroom and kitchen of a house I'm renovating bit by bit, and it's been maddening that no measurements I take of the old valves come anywhere close to the listed sizes of the new valves. Seems I wasn't measuring the pertinent things. So, it's the exterior diameter of the water supply pipe that sends water into the shutoff valve that is advertised, right? Does the same rule hold for the other end of the valve? That side would connect to a short mesh compression line rather than a solid metal line, which in turn fits to the appliance. So, the valve's output would be listed as measuring the exterior diameter of the compression line fitting into it; have I got that right? Thank you for your time.

@MasterToolRepair 3 жыл бұрын

Thank you for the watch and for the question! For compression fittings, the ridgid pipe that goes up to the toilet, there is a ferrule that slides over the pipe, you measure the OD of the pipe to obtain the compression fitting size. If you have a mesh tube that connects from the bottom of the toilet to the valve, that should also be a compression fitting. For this, measure the ID of the valve where it fits to th at flexible line. It will probably measure 3/8". www.homedepot.com/p/3-8-in-Compression-x-7-8-in-Ballcock-Nut-x-12-in-Braided-Polymer-Toilet-Connector-B1-12DL-F/100094502 For the pipe that comes out of the wall or floor, there are many types of pipes that were used. Old plumbing used threaded pipe. Newer ones used a solid copper pipe that was "sweated" to the valve. Others also used solid copper pipe, but instead of "sweating" the valve or "soldering" the valve, they used a 1/2" compression nut on the valve. www.homedepot.com/p/BrassCraft-1-2-in-Nominal-Compression-Inlet-x-3-8-in-O-D-Compression-Outlet-Multi-Turn-Straight-Valve-OCR14X-C1/202047042

@keithklassen5320 3 жыл бұрын

I'm interested in your advice on tightening the fittings. Another video from a plumber talked about taking the nut to snug, then giving it half a turn, no more. Your advice sounds better, but is that just because you're putting these together for compressed air, or should household water lines be the same?

@MasterToolRepair 3 жыл бұрын

Thanks for the question, Keith. Once you have tightened the compression nut, I would say to give it about a 1/2 turn more. There is no difference between a water line and an air line in regards to how much you tighten it. You would then turn on the water or the air to ensure that there is no leak. Since most compression fittings are soft metal and not cast iron, you do not want to strip the threads, just tighten it enough to make sure that it does not leak. With time you will be able to know how much to tighten it.

@TheDroppedAnchor Жыл бұрын

One can imagine tightening a brand new compression ring and reusing a still good compression ring requires a slightly different "feel". In any case, over-tightening is a sin as that ring will not be reusable. Under-tightening is easily correctable.