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Old 05-30-2019, 10:49 AM   #1
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Low Point Drains: threads?

Salem Cruise Lite. Going to add some type of outside wash down and use the water (hot&cold) off the low point drains. I know they have the PEX to the threaded cap?

What is the thread size?

My RV is 2 hours away so no easy way to tell from my desk!

Want to put shut off valves and then design a quick attachment solution.

Thx.
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Old 05-30-2019, 08:28 PM   #2
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Interesting idea. On another thread about rerouting the drains, someone said 3/4.
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Old 05-30-2019, 08:36 PM   #3
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Typically they should be 1/2 male pipe thread
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Old 05-31-2019, 06:42 AM   #4
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Quote:
Originally Posted by m and j in va View Post
Typically they should be 1/2 male pipe thread
THank you..if I had to guess that is what I would assume. I'll grab some parts and report back after this weekend my findings.
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Old 05-31-2019, 06:52 AM   #5
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1/2 pipe straight thread. Not tapered pipe threads. That's why there is a washer in the cap. The threads aren't doing the sealing like NPT. More from hydraulic industry than plumbing.
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Old 05-31-2019, 07:01 AM   #6
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1/2 pipe straight thread. Not tapered pipe threads. That's why there is a washer in the cap. The threads aren't doing the sealing like NPT. More from hydraulic industry than plumbing.
Interesting. Definitely don't have that laying around my hoarding inventory. I'll ask the plumbing nerd at my local store then.

I guess (if I recall correctly) there is enough PEX sticking out the bottom I could cut those ends off and crimp/Watts on some valves too. Now that I prob have laying around!
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Old 05-31-2019, 08:27 AM   #7
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I suppose if you were installing NPT threads with enough teflon tape or ptfe thread dope you'd get it to seal. But to try and go off and on repeatedly probably not good. When I did mine, I put in new nipples and ball valves out of stainless. All were tapered pipe thread I don't think it cost over $25 for everything I used... That was over 3 years ago
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Old 05-31-2019, 12:53 PM   #8
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I replaced my drain caps with a pair of the below valves. Used some ptfe tape and once tight, they haven't leaked.


https://www.menards.com/main/plumbin...&amp&ampipos=2
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Old 05-31-2019, 02:44 PM   #9
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Interesting. Definitely don't have that laying around my hoarding inventory. I'll ask the plumbing nerd at my local store then.

I guess (if I recall correctly) there is enough PEX sticking out the bottom I could cut those ends off and crimp/Watts on some valves too. Now that I prob have laying around!
That what I did.cut off the fittings and replaced them with these Sharkbite valves.got at H.D.Click image for larger version

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Old 05-31-2019, 03:15 PM   #10
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It is 1/2" NPT, but the hydraulic comment is close. These are designed to be used with swivel fittings(IE caps w/gaskets or taper inside) or just swivel fittings.
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Old 05-31-2019, 09:44 PM   #11
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I just cut off the 1/2" pex termination and put on WATT push on on/off valves. I think they were about $6.00 at Menards. They were a little closer and clearance was tighter then I hoped. I was hoping to connect them together for a hot/cold mix to a spray hose but I might just do the cold side as it's really for washing feet, filling dog bowls and such.

So cheaper and easier to deal with then sharkbites...which I love. I did my whole house upgrade in Watts and compression fittings.

Photo attached but once I get the hose with a quick connect on I'll add that photo.
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