Got a 1" NPT Tap? Wanna help?

[Marctrees]

Got a 1" NPT Tap? Wanna help? (Mini Pool)

Looking for someone that has a 1" NPT Tap, (NOT Die) to cut a female thread in the ID of a PVC pipe fitting.

No, what I need is not available as a stock part, and it's for a non critical no pressure situation.

I would mail you the fitting I need threaded, together w the 1" PVC plug that will thread into it, w a stamped envelope to mail back to me.

We live very rural, still checking, but haven't found anyone local yet.

Anybody game? Marc

 

[pi_guy]

In NY if you find no one closer PM me.

 

[LXCam]

I saw this when you first posted and almost jumped in with a big yup, no prob. But then I started thinking that I don't remember seeing my 1" anytime recently so I went looking. I have everything up to 2" but the 1" is missing. Damn, I must have loaned it out but I'll be darned if I know who too. Sorry bud, good luck.

 

[dogdog]

if it is one off and not pro use ... HF have a set out of HSS.... good for one or two or three off uses.... but you have to drill your holes as close to required as possible... I have used it no issue even on pressure applications... ymmv.... that set probably would cost less than the postage for your part.

 

[Marctrees]

Thanks so far Guys.

dog - Ya, I will never use it again, so don't really wanna buy.

It's just one PVC piece I need threaded.

I'm in E TX, so I guess the closer, the less postage time. Marc

 

[thertel]

Let me check my box tonight when I get home, I've got a set of NPT taps floating around from a project a few years back. Not sure if I've got them or I left them at my father's place. I'll check tomorrow evening. It may be easier to ship you the tap since it should fit in a small flat rate box.

I'm in Austin. I'll shoot you a PM once I check

 

[lazer50]

I may have a 1",and be glad to help ya out.I'll check here in awhile.

 

[dlwilson]

I have this set from Harbor Freight that I bought for a one time project when the quick disconnect heater fitting on my Suburban broke. If it is what you need, I can mail you the 1" tap.

https://www.harborfreight.com/6-piece-pipe-taps-42432.html

 

[rbgearz]

I have the tap. Contact me.

 

[Cope]

I am in Houston, and I have a 1" tap.

 

[tonyciambrone]

Couldn't you buy a slip x fpt bushing and a 3/4" plug?

Glue it on the 1" Pipe and thread a standard 3/4" plug in

Never really heard of tapping the inside bore of a PVC pipe before...

http://www.thatpetplace.com/reducing-bushing-slip-fpt-1in-3-4in

 

[Marctrees]

tony - Thank you, but it's an oddball situation different then usual.

BUT - I did find an errant bulkhead fitting that I can modify myself as a workaround .. I think.

Give me a few days to check this out.. in meantime, Thank You to those that posted to help, and I still may be contacting one of you later in week.

Marc

 

[tonyciambrone]

No problem, if I'm thinking about this right you are going to be left with like 0.060" of wall thickness left or less if it's tapped for 1" npt. Never been in that situation to know how well it will hold up.

Good luck

 

[Richard Cranium]

so what are you building?

 

[Cope]

Couldn't you buy a slip x fpt bushing and a 3/4" plug?

Glue it on the 1" Pipe and thread a standard 3/4" plug in

Never really heard of tapping the inside bore of a PVC pipe before...

http://www.thatpetplace.com/reducing-bushing-slip-fpt-1in-3-4in

He wants to thread a pipe fitting. It will be thicker than the actual pipe.

 

[Marctrees]

Ok, so we all know that plans can evolve and change.

At this point, what I need is - I have a 1 1/4" PVC "Connector" - One end is a slip fit female to accept a pipe, other end is 1 1/4" thread.

Regular common everyday Connector.

What I need is the ID of the male threaded end threaded for a 1" screw in plug.

But again, I am now looking at doing it a totally different way, using a Spa bulkhead fitting w internal tapered threads, but from BOTH directions...so I can screw the regular connector to the outside, and thread the plug in from the inside.

So I should be ok w that setup IF the radius of the "through hull" hole is not too radiused.

Clear as mud now.

What am I building?

Actually all it is is a drain plug to be used like 2x year in a small pool that has a cast in place Aluminum ?"Hub" ? (like the output welded on female thread on a compressor tank)

Like one of these - https://www.google.com/search?tbm=i...w=1396&bih=691&dpr=1.38#imgrc=Vg5kQchXv6ZEvM:

But now I'm thinking may just holesaw that hub thing out, and install that bulkhead fitting to create my threaded hole for my internal plug.

And I kinda have to use the hub location, cause of a bunch of other plumbing orientation on this pool shell.

I need a plug inside, I cannot put a valve outside cause it will be totally concealed and a hassle to access it even w a homemade shutoff wrench.

So, as I sed, I'll see if it will work with the part I found, and will report back in a day or two.

Thanks again, I'll be back. Marc

 

[Matt Matt]

Is this for a hot tub? And for draining purposes?

I have the tap but it's out on loan right now. But I'm more interested in your situation.

 

[Marctrees]

Actually an ambient temp little "Martini" Pool, made from a 1k gal HDPE Stock tank..Light Blue color, about 9' dia x 30" or so deep.

And yes, for the annual or so rarely used drain.

I did it previously at old house, set in concrete patio fully filtered/ pumped just like a regular pool.

This one will sit flush in a wood deck that is about 24" above grade.

So it get's dug down in sandy soil about 6"

Very easy to plumb .. 4 incoming jet bulkheads, 2 suction fittings...and the rarely used drain this post is about.

The equip actually is big enough for about 8k gal, so at 1/8 of that it has such low maintenance it's awesome.

Had it about 3 yrs at the old house, very simple maintenance, very cheap chemicals....AWESOME Bang for Buck idea.

Don't have any photos of mine, heres a better link - the one in post above got goofy -

https://www.google.com/search?q=sto...vbDWAhUBaSYKHY_OC-QQ_AUICygC&biw=1396&bih=691

 

[tonyciambrone]

He wants to thread a pipe fitting.

Yesterday's news...

It will be thicker than the actual pipe..

In my experience with threaded pipe, the threaded portion is not, in fact, larger than the unthreaded portion...

1" pipe outside diameter...1.315
1" NPT effective thread diameter...1.25630

1.315 minus 1.25630 = 0.062" (assuming you tap this pipe exactly centered, that will be the remaining wall thickness)

Until I see pictures... Either get a male threaded portion of 1 1/4" and get a square nut female threaded pipe cap. Or use a slip to female threaded bushing and a male threaded pipe cap... I don't see how either of those would create a clearance issue.

 

[tonyciambrone]

Ok, so we all know that plans can evolve and change.

At this point, what I need is - I have a 1 1/4" PVC "Connector" - One end is a slip fit female to accept a pipe, other end is 1 1/4" thread.

Regular common everyday Connector.

What I need is the ID of the male threaded end threaded for a 1" screw in plug.

1 1/4" pipe I.D is 1.380"
1" NPT tap effective O.D is 1.2563"

It will fall right through. Even if you could tap the inside bore of a male threaded pipe there would be no wall thickness left whatsoever... Charts for all these dimensions are readily available...

Plastic pipe is made to be Slip Fit or it is made for pipe with male theads to go into fittings with female threads.

 

[Marctrees]

I know it sounds stupid, and it is, but I do not have my caliper available at this time.

I have this - https://www.pvcfittingsonline.com/436-012-1-1-4-schedule-40-pvc-male-adapter.html

And this - https://www.pvcfittingsonline.com/450-010-1-schedule-40-pvc-plug.html

When I **** the pieces, it sure looks like threading like I said will work. Marc

 

[robert_dean]

https://www.amazon.com/dp/B005JQQFW2/?tag=atomicindus08-20 Maybe this may work for what you're describing? I'm curious now also!

 

[Marctrees]

Robert - Ya, similar to that.. I'm gonna see if a Hayward pool bulkhead that one can screw variety of eyeballs into, but I'll screw in a plug will work.

http://www.royalswimmingpools.com/M...00001/Hayward-SP1023-Return-Inlet-Fitting.jpg

https://images-na.ssl-images-amazon.com/images/I/81wmteQ8aAL._SY355_.jpg

That internal thread that you see in photo, is tapered from BOTH ends, so the tightest thread is in the center.. meaning you can thread a regular tapered pipe into the backside, and a eyeball..or plug in my case into the other end.

My problem is.. this is going on the sidewall of the pool, as close as possible to bottom, so I have compund radiuses to contend with in my mounting surface that the flange of the bulkhead seats against.

I may be able to make a curved saddle like gasket from RTV Silicone to fill the gaps. Marc

 

[pi_guy]

My problem is.. this is going on the sidewall of the pool, as close as possible to bottom, so I have compund radiuses to contend with in my mounting surface that the flange of the bulkhead seats against.

I may be able to make a curved saddle like gasket from RTV Silicone to fill the gaps. Marc

Try to find a barrel garbage or 55 gallon drum or a plastic container that matches the radius your trying to fix.

Aquaticsource.com had all sorts of plumbing items for ponds and tanks

 

[robert_dean]

I see, so your concern is that you want to mount the fitting in the radius portion of the tank to get the drain as low as possible. Is that correct? Maybe trying to locate a large/thick chunk of live rubber that you could form your radius into? Or mounting the fitting as low as possible before t he radius comes into play and just plan on using a sump pump for the remaining water??

 

[Marctrees]

Robert - You got it, all correct.

The pool is about 9' diameter, 1/8" thick HDPE, so I have that large radius horizontaly, but at bottom of tank the wall to bottom radius is like 1"...so the 9' is no problem w a flat flange cause it flexes flat enough, BUT at the bottom, there is way less flex cause its reinforced by the bottom.

So now I have the "compound radiuse's " I mentioned.

If it was another matl other than Poly, I would probably use RTV Silicone to make a gasket in situ in that convoluted shape, but w the rtv not bonding to poly well, all I have is the flanges of the bulkhead fitting squeezing together.

Which may be OK, BUT, I dont want to mess w pumping out last few inches, so, I want to cuttoff the flange against the pool bottom.

So that's where your "live rubber" idea may help.

Hmm, thinking about where to get about 1/4" rubber 4x4"

First gotta get to the pool and see if this will all work, then worry about the rubber.

The original idea of threading a fitting for a screw in plug is still an option.

And no, I can't really use any sort of expansion plug for a few different reasons.

Such a seemingly simple thing, but such a PIA w no perfect solution. Marc

 

[matt_i]

Hmm, thinking about where to get about 1/4" rubber 4x4"

I would start w McMaster Carr. EPDM would probably work in water service.

 

[robert_dean]

I say " live rubber" more as a generic shop term, we use lots of bulk rubber at the foundry I work as well as other materials - over the years "live rubber" has become a catch all term. Maybe a nylon would be more robust allowing you to get a very tight bond along with an appropriate sealant. I think you have the answer, just a few small details need to be fleshed out.

 

[Marctrees]

OK, all solved and done.

Ended up hole sawing out the original hub, and am going to install the white pool "through hull" fitting.

You will see the radius where wall turns to floor and understand what my concern was.

If the original hub had been any lower, this may not have worked and I would have had to do the "tap fitting" other method.

The through hull fittings are taper threaded from both ends, so now that the taper direction is re oriented, I can screw in my drain plug from the INSIDE... which is what the entire rigamarole was all about..

Thanks all that commented, and especially the Guys that offered to help.
Group Hug !!!! Marc

 

[Marctrees]

Nice flush, not foot cutting or knee bruising plug...... Marc

http://www.4guyspoolsupply.com/hayward-sp1022b-cycolac-plug-1-1-2/