Soap tank over-floods

[Waxman]

The problem: Soap tank overflows when rinse is running in the bays.
The background: I recently hooked up cold water rinse option after running 5 years w/everything on hot water. There is a Watts regulator on cold water line. It was pegged at 60psi and I dropped it back to 45-50 thinking it may be too high.

What I did so far: replaced diaphragm on Hydrominder 511, thinking water was getting past it somehow. I didn't fix the overflood and I noticed a steady, slow rise in the level of the tank (when 1 bay was on 'rinse) and a watering down of the soap in the soap tank.

This problem started after I plumbed up cold water rinse.

TIA/ wax

 

[soapy]

Put a check valve in the line so that cold water can't flow back to the soap tank.

 

[Fatboy769]

My soap and wax solenoids are installed backwards, which acts as a check valve to keep the city water pressure from rinse from backflowing into either chemical.

 

[MEP001]

My soap and wax solenoids are installed backwards, which acts as a check valve to keep the city water pressure from rinse from backflowing into either chemical.

This actually works really well. D/H equipment had it this way for years before they moved to block solenoids. I did the same thing after too many check valve failures. If your soap goes through a block solenoid it won't work; you'll need a check valve on the soap and wax lines to keep the pressured rinse water from pushing past them.

 

[Buzzie8]

Definitely check valves. That's what happens when mine fail.