907plumber

I recently installed a Aquasana Rhino Whole house filter system. All the pieces they send you are schedule 80 grey pvc. The pipes are male thread on one end, the other end is untouched so you can glue a union on it.

They state in the instructions, teflon tape only and dont overtighten.

Im going out tommorow for the 4th time to fix a leak. Everytime I get a leak fixed I get a call that it is now leaking somewhere else. Last time I was there I tightend everything as much as I dare cause I didnt want to come back. They are a half hour drive from my location. But wouldnt ya know I get a call this after noon that its leaking again.

Im running out of patience here. Im now thinking that my workmanship is fine but I might be dealing with a defective product. Im telling the HO this is the last time Im coming out under my personal warranty. As I believe there is nothing I can do other than to maybe try plumbing without the factory supplied parts. But that voids her warranty. Im thinking of appling glue to the threaded joints then threading them in. Also Im not a big fan of copper to plastic joints. In my experience the plastic part usually gets ruined.

Anyone else deal with threaded PVC pipe connections that operate at 60psi? I have never even seen threaded PVC other than adapters but I never use those exept for drainage.

U666A

Sorry to hear of your luck, 907.

I have SOME experience working with threaded plastic pipe/fittings, and although the last time was 3 or 4 years ago, I remember them being somewhat tempermental.

It definitely causes one to question their own workmanship for a moment, when something that would seem so remedial ends up causing a tonne of aggrivation.

I'm afraid I can't offer all that much help from here. Not that I am recommending or endorsing either product (don't feel like engaging in that forum-wide battle right now) but I seemed to have good luck with "Master's" pink teflon, and also "Pro-Dope" by the same manu.

We built a fairly complex RO system in the fab shop of the co. I work for and therefore have worked with both 40 and 80 grey PVC.

Getting decent thread engagement was somewhat of a challenge too, if I recall, on the threads that we cut.

If I were to set the dies to give me 2-1/2•3 turns, it would bury by hand, yet at 2 - 2-1/2 turns, it would tighten up to the point of shattering in under one revolution. Tried new chasers, a different die holder, and even a set of ratcheting hand threaders on the 1", which all produced the same results.

If anything, it made us more careful with every joint and during startup, ended up with 1 leak out of over 60 NPT joints.

Sorry for the rant. All I can say is good luck, and I feel your pain!

UA

__________________
"The following user(s) says Thank you to U666A for this useful post: Mississippiplum, Plumber71, DesertOkie"

Mississippiplum

I never have any problems with threaded sch 80 PVC or PVC male/female adaptors.

The secret is teflon tape 4 wraps, and a small dab of thread sealant- a Teflon based sealant is the best. And don't be afraid to tighten up the fittings, I've never had a PVC fitting break on me never, and I've had to work on some questionable joints. A dab of thread sealant won't hurt nothin, it gives the joint the lubrication it needs, PVC joints like to build up alot of friction, and that causes the joints to be hard to assemble.



sent from the jobsite porta-potty

__________________
''i would rather die on my knees with freedom then on my feet with no freedom"

GREENPLUM

That should work, ive done it before with success.

Airgap

The problems I have had with it, there has been vibration or temperature swings, usually from being connected directly to a pump....

Properly placed unions are important so everything can be retightened if need be....

__________________
AG..Keepin' the good water from the bad water....

AWWGH

Tape/Dope and crank on it. Sch 80 is tough stuff and I've never had any problem throwing a couple wrenches on it and cranking. Seems to me that you're more likely to bottom out before cracking.

__________________
CT Unlimited Plumbing Contractor/ CT Unlimited Well Drilling Contractor/ CT Licensed Water Systems Operator/ NATE Certified HVAC Installer

Mississippiplum

Exactly, never had a problem here either.

sent from the jobsite porta-potty

__________________
''i would rather die on my knees with freedom then on my feet with no freedom"

no drip

I have install the same unit and had the same promblems.After 3 trips back, the pvc cracked and caused a flood.F....ing nightmare.I replumbed the unit in all 1'' brass/copper out of my own pocket.

Tommy plumber

I've used schedule 80 threaded fittings on irrigation and well pumps for pressure applications. Wrap teflon tape (4) times on male threads. Then put pipe dope over teflon tape. Put a little pipe dope on the female threads; (my code says this is prohibited, but sometimes it's needed on the female threads.). Then crank that schedule 80 nipple good and tight with a pipe wrench. Shouldn't leak or drip.

__________________
Hire a licensed master plumber.

localguy630

Tape+dope+wrench=happy plumber