Am I insane or genius with this heater bypass?

SoCalDIYWannabe

Active member
Mar 14, 2025
31
Orange County, California
Pool Size
20000
Surface
Plaster
So I ran out of time and patience as I put in the new pump and filter. Yes, someone keeps saying it on here, I'm going to give a shout out. That Intelliflo3 is QUIET!!!

I have such a small area to work with. And I didn't get all my bypass and heater stuff done. but I need the water circulating. So I did not install my SWCG (I can't use it anyway, just resurfaced.) Basically, I just did a temporary Filter-out and ran it to the out-to-pool line. I did it with enough height that I can cut and reuse.

So here's what I'm thinking. Autobots, transform and move out!
The pump is built with unions at the inlet and outlet.
The filter is built with unions at the inlet and outlet.
The heater is built with unions at the inlet and outlet.

I imagine the heater bypass is not used very often. I didn't have one for the last 20 years. Though there were a few times I wish I did, when the heater wasn't working, and after the resurface when too much plaster dust is coming through, and probably now with a little bit of pvc dust from cutting. So what if the bypass was more of a complete removal.

In the attached photo, the blue are unions I mentioned before. The layout as it is runs from the filter up, and then towards the heater with a tiny drop in elevation, then from the heater up and over, to the (future) RJ60 or IC40, and then out to the pool.

The red are unions I would add. That would create 3 puzzle pieces.
1 - going from the filter to the heater inlet - could be removed and stored or placed on the side. Can cap the heater inlet.
2 - going from the heater outlet to the SWCG - could be removed and stored or placed on the side. Can cap the heater outlet.
3 - (yellow) can be rotated 180 so that the from the filter now goes directly out to the diverter valve.

Voilà. Bypass, with possibly improved flow because less tees and elbows, and less clutter.

So, genius or insanity?

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I'm going to give a shout out. That Intelliflo3 is QUIET!!!
I had fun with it selling my house. I'd bring the people out to the pool to see it running and ask them if they heard the pump. OK now turn around. It's behind that bush 10 ft away.

They'd all :shock:



So, genius or insanity?
It depends on the intent. For folks looking for an easy and cheap way to one day take the heater out of service, or for folks who shut the heater off for long stretches, it's genius.

It would be more trouble than it's worth for the folks who want to repeatedly bypass the filter for less flow restriction. I'd go so far as to want that automated and I'm not usually a big fan of automation.

Every time you swap the union only bypass, it might need extra love to come off, or it might go back on with some drips.
 
Every time you swap the union only bypass, it might need extra love to come off, or it might go back on with some drips.
X2. I’m literally replumbing my pad to get rid of the unnecessary unions. I had one break on me before I closed and replacements are slightly different so I have to cut stuff anyway and won’t need to deal with leaking o-rings anymore.