Backwash procedure for pool with 2 filters

[JPMorgan]

The concern I have is what does that actually mean? Is it hydraulically inefficient because it should be 4”, 6”, 8” in diameter?….. or because it has too many restrictive fittings….or because anything? They have not defined the actual root cause, which leaves you with a potential fix that could mean re-plumbing everything depending on the knowledge/expertise of the diagnostician

Bsaed on all the feedback here, problems with the pump are my primary focus and the first thing that I will have them check. With respect to the plumbing, here is the full description of what the PC said about the "hydraulically inefficient" plumbing... "The plumbing configuration is not hydraulicly efficient as the system is bushed down from 3” to 2” pipe before the system splits off the two filters."

I think this is the section of the plumbing they are referring to. Does that make sense.... or is this not likely to be a source of the problem that needs to be ruled out?

 

[JamesW]

Are you saying when a PC sells you this type of pump, they can't install it and have to bring in a Commercial Electrician to do that?

We are doing diagnostics, not a new installation.

Also, most pool service people are not familiar with three phase power and they should have a qualified electrician provide power.

If your pool people are so qualified, then why are you having all of these problems?

Their job is to make things work correctly and they are not able to do that, which is why you are having to try to fix it yourself.

If they knew what they were doing, then everything would be working correctly.

 

[mas985]

Bsaed on all the feedback here, problems with the pump are my primary focus and the first thing that I will have them check. With respect to the plumbing, here is the full description of what the PC said about the "hydraulically inefficient" plumbing... "The plumbing configuration is not hydraulicly efficient as the system is bushed down from 3” to 2” pipe before the system splits off the two filters."

I think this is the section of the plumbing they are referring to. Does that make sense.... or is this not likely to be a source of the problem that needs to be ruled out?

View attachment 649281

I think we covered already. A 2" to 3" bushing has about the same head loss as a 45 bend so not much at all. That is not the problem.