Connection from pump to filter

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JRC1954

JRC1954

Silver Supporter
Mar 27, 2020
58
Hershey PA
Pool Size
26000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-60
Hi guys! Got the new Circupool VS pump and am looking into fitting it into the equipment setup. The current system includes a Hayward EC 65 DE filter and a Hayward Superpump. The picture attached shows the 1 1/2 inch plumbing between the pump and filter. It is a union I’ve not seen before. It has a bell shaped internal fitting that joins with the mating piece. It has often been a bit of a problem making that watertight. Since the new pump has a female 2” threaded fitting. , I’d need a union that also is a reducer down to the 1 1/2” size into the pump.
Is there such a fitting?
 

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It was part of the package I bought with the original pump/ filter years ago. If I kept the same position with the pump outlet when I put the new pump in, i’d have to have a reducer in its place, given the 2” output from the pump going into the 1 1/2” female thread in the filter. Maybe it makes sense to just move the pump a little farther away to gain a little more room, and use more “standard” PVC fittings...
The original fitting is a combined elbow and union. It has a thick rubber gasket at the base of the female outlet on the pump, and a round gasket that fits into the female part of the union on the other end. I’m sorry if I am explaining this badly. I am not completely familiar with the terminology. I think they used it due to the short distance between the pump output and the input to the filter.
 
Moving the pump to give room to use standard fittings and unions is what I was thinking.
 
That equipment came as a unit pre plumbed, I'd bet. What size is the pipe between the union and filter, it looks smaller. Can it be removed from the filter?
I would get rid of the specialty fittings if possible, especially if they will be a problem for the repair, which it sounds like. You could expect to lose about an inch with a threaded reducer into the pump, which would necessitate raising the filter or lowering the pump the same amount to get it to line up. Assuming the pump dimensions are the same. With standard fittings you may not need to relocate the pump. Those sweep 90s take up a lot of distance compared to a standard 90. You could come out of pump with 2", put a reducer in your 90, then to a union and on to the filter. If that other pipe is smaller, I would reduce to that size at the 90.
I am not sure what filter you have there, but be careful your new vs pump does not exceed the flow rate of your filter by too much. You could damage the filter or the pump.
 
Thanks all. I think what I will have to do is buy a bunch of fittings (relatively cheap thank goodness) and put this together like a puzzle.
 
Just thinking out loud. The Hayward EC 65 filter is 30 yr old technology. DE filter uses “fingers” which are hard to clean. Is there improved technology to be had in the filter area that I should consider given the rest of this revamp? The EC 65 is rated for 68GPM. Not sure this is compatible with the Circupool 2 Hp VS pump? This is like dominos.....
 
Consider a cartridge filter to replace your DE filter.

You buy a VS pump to run it at slow speeds. You are unlikely to run it at 68gpm.
 
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