Questions tagged [pipe-fitting]

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1970’s ABS OD Pipe Size is Larger

We have a 1974 condo with some lateral 2” ABS schedule 40 pipe. Strange, but current fittings with hubs do not fit the old pipe. It’s as if the older pipe is just “slightly” larger than the current 2....
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19 votes
2 answers
4k views

Why not put pipe dope on female thread?

What is the risk of having pipe dope in natural gas line? Not blobs of dope, but a thin layer or bead on inner (female) thread. Most instructions on using pipe dope on gas pipe says to put pope dope ...
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1 answer
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What connector to join/extend 1/4 in stainless steel fridge water line

I am running about 6 feet short and need to extend 1/4 in stainless steel fridge water line by attaching another hose assembly with 1/4" female swivel compression fittings at both ends to it's ...
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  • 103
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1 answer
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What type of fittings go in and out of a shower water filter? (and/or, what type of fitting does a shower head use?)

For a shower water filter like this: https://www.geapplianceparts.com/store/parts/spec/GXSM01HWW What are the connectors? The specs say "standard 1/2" shower head and pipe connections". ...
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1 answer
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What are my options for connecting my water filter to my faucet?

I have this under sink water filter: 3M Aqua-Pure Under Sink Full Flow Water Filter System Cyst-FF It has push-to-fit 3/8 tubing going in and out. It comes with sufficient hardware to go from the ...
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3 votes
2 answers
375 views

Where is the one-eighth in 1/8-27 NPT?

Where is the "one-eighth" in 1/8-27 NPT? I know it has 27 threads per inch. I see references that 1/8" is the nominal pipe size, does that mean the hole inside the thread is 1/8" ...
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  • 339
2 votes
2 answers
135 views

What is this elbow joint pipe?

This elbow joint is leaking. I think it’s the condensation pipe off the boiler because it seems to leak when the boiler comes on. I’ve tightened it fully but still leaking. The pipe on the left (...
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1 vote
1 answer
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Does a 3/4" FIP gas fitting effectively reduce the run size for 1" CSST?

I'm running about 50' of 1" CSST natural gas tubing and want the best flow possible before I branch out and step down. I see there are two choices for connections; 1" MIP (3/4" FIP) x 1&...
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  • 272
5 votes
2 answers
1k views

Why can't I find a cleanout plug to fit my drain pipe?

Trying to cap a water line that connects to my sewage out line. I purchased a cleanout adapter with cap in 2" and 3" and one is too big and one is too small. I think I need a 2-1/2" ...
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5 votes
2 answers
2k views

How do I connect my sink to the drain in the wall?

I'm a real novice when it comes to plumbing. I've got a threaded 45 coming out of the wall (white pipe on the right) and an unthreaded black tailpiece coming down from the sink. How do I install a P-...
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1 answer
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replacing residential circulator pump flanges with shutoff flanges

About 15 years ago the local heating company installed a new boiler and put on a standard TACO circulator pump with standard flanges that do not isolate the pump; on the boiler side the flange is ...
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1 vote
3 answers
280 views

Why doesn't my threaded copper pipe fit a SharkBite reducer?

I have the old 1 inch copper pipes in the basement. I'm about to reduce the size of the pipe into 3/4. So I bought a reducer, SharkBite 1/2 x 3/4 reducer(picture 1). The problem is my pipe size is a ...
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