Ball Valves on a Tee vs 3way valve

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
33,563
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Ball valves will eventually stick and handles will break off and need to be cut out to be replaced. Diverter valves can be rebuilt easily.

A heater bypass is best done with a 3 way diverter valve and a check valve.


You can use a 2-way diverter valve instead of ball valves.

When you have two valves that must be opened or closed there is the risk that someone will only open one of them and deadhead the waterflow and damage equipment or plumbing. Best to have one valve to accomplish a bypass.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
25,208
Bedford, TX
SW,

What is is that you are trying to do?

Are you trying to by-pass the heater, or trying to isolate the SWCG from the heater, or????

No matter what, I'd use 2 or 3-way Jandy valves, maybe a Jandy check valve, but I'd never use a typical Home Depot ball valve.

Thanks,

Jim R.
 

swirlywater

Well-known member
Feb 1, 2015
77
columbia station / OH
Pool Size
30000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
Here is what I am trying to do. I was thinking while I am at it, I could isolate both the heater and SWG. I only ordered 1 three way and 1 check valve for the heater. Now I am thinking the best way to do this would be a 3-way on each side of the SWG.

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swirlywater

Well-known member
Feb 1, 2015
77
columbia station / OH
Pool Size
30000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
Circupool RJ45. My signature is off because my pump station is disassembled and I'm rebuilding. I track my balance carefully but my heater prematurely wore out. I'm on the north coast, it gets used a lot. Blows my mind the front of the unit says to install a check valve but installers don't do it. Now that I am rebuilding, I don't want to touch it again. My pool is closed all winter and it takes a minute in the spring to re-balance and clean it up. When my heater was leaking I had to shut the whole system while I evaluated the problem. In the end I took it out of the loop. I would have preferred to troubleshoot my system without shutting down the pumps. While I am at it, wouldn't it make sense to be able to take the swg off line while still running the pool? I would do it for spring cleaning, repairs, whatever. 2 way valves are cheaper Than 3 way, though maybe it doesn't matter since this is a permanent change.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
33,563
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
I have a heater with a heater bypass and an IntelliChlor SWG cell. I have never needed to bypass or remove the SWG cell. I do bypass my gas heater at pool startup until I have the pool pH stable in the 7's and TA where I want it.

I see the reason for a heater bypass. I don;t see a reason to bypass a SWG cell.

A heater has a cooper heat exchanger that is sensitive to low pH. A SWG cell uses titanium plates that are not very sensitive to water chemistry.
 
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