you could try marine epoxy instead of silicone too. ive used it to patch ballast lines on my wakeboarding boat and it works amazing
PVC.denitrate filter leaking solutions needed
- Thread starter jaws7777
- Start date
NPT means National Pipe Taper which means the pipe thread is tapered so you don't want to thread the tap completely through the material or else you will have difficulty getting a good seal of the fitting to the tapped hole.
BulkReefSupply is another e-tailer for the seal. I'd go with seal and save yourself the headache.
Agreed. Ording them tonight. This little filter is giving me more issues than any of my sump builds smh
Ah! I see the problem... I didn't notice in that video he goes all the way through! Good catch.
I usually put the tap about 2/3 of the way in when I do this. I've gotten a little carried away before and gone too deep and then it is a real pain to get a good seal. If you don't go deep enough with the tap, you'll have trouble screwing in the fitting and I suppose you'd also be increasing the chance of damaging the pipe or fitting. Gotta find the happy middle ground when tapping. Video posting fail
Npt tap has external tapered thread which you need an internal tapered thread for it to mate to.
Also an not thread is designed to seal on the first 3-5threads if there is full thread engagement the rest are for holding strength. also needs Teflon tape or pipe dope to seal properly
J
jaws7777
I think what Grinch mentioned is your best option. You can get a tapered pipe tap at any hardware store, but I would get a quality one, so avoid Harbor Freight when getting one. You simply drill the hole with a bit that is a tiny bit smaller than the bottom of the tapered pipe tap and then use the tap to put the threads in. Make sure you have a fitting handy and check the thread depth every so often on the first hole. You want to get a good 3-4 threads loosely engaged before you tighten it up. Then, use 2-3 wraps of quality teflon tape (I recommend Blue Monster by MillRose) when installing the fittings. Use a wrench to snug them up but be careful since you are dealing with PVC that you don't over tighten it and strip it.
I use this method at work with steel pipe and brass fittings and it regularly holds 400+ psi for me. I think it will hold plenty for you to run your flow through it.
Lastly, if you end up replacing the pipe (I recommend you do because PVC is cheap and it's better to start fresh than to try to fix what's already there) you might want to go with schedule 80 so that you get more threads in the sidewall.
Good luck!
I use this method at work with steel pipe and brass fittings and it regularly holds 400+ psi for me. I think it will hold plenty for you to run your flow through it.
Lastly, if you end up replacing the pipe (I recommend you do because PVC is cheap and it's better to start fresh than to try to fix what's already there) you might want to go with schedule 80 so that you get more threads in the sidewall.
Good luck!
Im gonna go with the uniseals for now bit i agree this woulf be worth a shot if they dont work...also agree about starting fresh would also allow me to keep the current fiilter up and running while i build the new one so as to not kill the cycle
That's a good plan. Fortunately, PVC and PVC fittings are really cheap so you can just buy more without worrying too much about it. Lol
