I favor the Noryl bypass valve because it is shallower and you can get the softener closer to the wall. also, While the body of the SS bypass is stainless steel the guts and lever are not... I have seen them corrode and bind.

Since OPWC and ALL online softener seller drop ship from regional wholesalers EVERYTHING has to be ordered. It is as EZ for them to order the Noryl bypass as to order the SS.

They sell 50-1 SS bypasses because SS is a buzzword and they don't know why the Noryl is better. If SS is better then why do ALL the softener control valve manufacturers sell Noryl valves?

Sometimes you can't teach an old dog new tricks and sometimes you can't teach an old dog any tricks at all.

If you download the Fleck 2510 manual from the Fleck web site
click here for 2510 manual you will see the Noryl bypass illustrated on page 26

Thank you for the manual link. I spoke with Charles at Ohio Pure Water this morning and changed over to the Noryl bypass. Charles has been very helpful and made ordering and making changes very easy.

I have heard nothing but good things about OPWC and have referred many people to them.

They do not seem to program their softeners for the most efficient operation though... but that is very common among online sellers.