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Question on installing 80 gal. electric heater. can the two inlet nipples be removed to put in two dielectric pipe unions?

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Yes, but I would adapt the dielectric unions to the nipples... they often contain checks that help to control water flow and save energy...I would not remove them if couplings on them end them install the unions.


Posted on May 27, 2011


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We find tiny yellow sediments in our hot water (not in cold water). What's the the reason and what can we do to get rid of them? Thank you!

I would suspect you have a water heater that got installed without dielectric unions between all connections (Hot, Cold, and Drain, if there's a hot water recirc. system) and the building piping. OR that you have a combination of copper and galvanized piping that's missing a dielectric union at each change from galvanized to copper and back.

May 06, 2017 | The Computers & Internet

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I have a Rheem 82V52-2 electric water heater that twice the cold water feed has plugged completly not allowing cold water in. Any idea what is causing this?

sounds like a corrosion issue if you went into the heater with a copper male adapter or an unlined galvanized or worse a black nipple . replace the connection with a dielectric union that separates the different metals this will also prelong the life of the heater

Dec 30, 2014 | Rheem 82V52-2 50 Gallon 240V Electric...

1 Answer

Bypass valve diagram

There are various ways of by-passing the water heater. If your starting from scratch, can advise, but if you have an existing that has you confused, please describe what you have the best you can and hopefully I can solve your problem. It can be as simple as removing the 2 fittings from tank and join them together with a pipe nipple of same size, usually 1/2". That's a simple by-pass solution. After winter, disconnect from nipple and install back on water heater fittings where they were removed from.

Apr 09, 2013 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

Water heater pipes

1) Electrically bond pipes to ground to avoid stray current corrosion.
Use pex-lined di-electric nipples instead of dielectric unions.
Unions depend on rubber washer and will eventually leak and corrode.

Mar 15, 2013 | Water Heaters

1 Answer

Plumming brass nipple leaking water

Are you installing nipple in top of tank-type water heater?
Did you use 6 wraps teflon tape?
Is the nipple IP iron pipe tapered thread? Or is it straight thread?

Why are you replacing nipple?
Was old nipple leaking?
If previously sealed pipe connection to water heater has started leaking, then it implies the tank is rusted, and water heater needs to be replaced.

Have you checked the anode rod.

Why are you using brass instead of pex-lined di-electric nipple, available from box store?

Sep 11, 2012 | Water Heaters

1 Answer

Water is leaking from the pipe on the top of the tank (Reliance 606 electric) where the hot water comes out and goes into the house. Likely causes?

If tank is rusted out, then that is caused by depleted anode rod, or tank that is not electrically grounded on hot side pipe.
If pipe nipple is rusted out, then that can be caused by improper connection between copper and galvanized pipes, and caused by non-grounded hot water pipes.

If tank is leaking, replace it.
If nipple is leaking, remove with pipe wrench, apply teflon tape or joint compound on threads, and install new nipple. Replace anode rod if possible. Correct copper-galvanized connections. Add ground wire between hot and cold pipes.


1 Answer

No hot water

I am afraid that you have burned the heating element out or an inline fuse is burned out

May 15, 2010 | Rheem 30 GAL ELEC SHORT Water Heater 6YR...

1 Answer

The inlet and outlet nipples are corroded after 2 years of installation

Sounds like electrolysis (when you mix the material used galv nipples are bad for this) s/b dielectric unions

Mar 15, 2010 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Hot water heater flow problems.

hey Bookie, those plastic inserts are kinda moulded into the nipples, so taking them out might be more than a feat,...did you solder the pipe to the female adapter ON the nipple? if you did you melted the plastic and that is what's your restricting your flo,......or (believe it or not) the inlet water valve isn't turned on all the way,.....close it then open it,..could have somethin stuck in it. let me know eh? thanks and good luck, cracklin joe

Jan 05, 2010 | General Electric GE SmartWater Household...

1 Answer

Rheem 25 ltr cylinder leaking from top

if it is comming out of the cover , you will need to replace the unit ther is no way to fix the tank,, is it comming out of both the inlet and outlet, if it is just comming out of one wipe it of and look at the threads it could just be the adapter in which case you need to drain it and cut the pipe remove the adapter put teflon tape with pipe thread sealer. put the adapter back on, re attach the pipe, if it still leaks you will have to change the unit, if it is electric make sure you turn it off at the circuit breaker before draining you don;t have to drain it all the way

Jun 05, 2009 | Rheem 80 GAL ELEC TALL Water Heater 6YR SC...

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