One way valves and hose sizes for vasic Jabsco 37010 electric system

[Chaff]

Hi everyone,

Thanks in advance for advice here. I have asked jabsco/xylem for technical support but no joy.

I have inherited 3 x Jabsco 37010 quiet electric heads each one discharging to a holding tank the tank entry is about 1.5 m vertically from the head discharge with about a 2 to 2.5 hose length in total.

After each heads joker valve is a approx 30 to 50cm length of 25mm hose (clearish..) into a 25/38mm whale one way (v. Similar to jabsco joker). On the other side rhe hose steps up to a 38mm for rest of journey to tank.

Head manual doesn't indicate extra valves required, nor step up to 38mm. It has been suggested the step up to 38mm can only 'hamper' the system as it creates so much extra pressure on the head to discharge into.

Anyone know what is 'correct' regards number and location of extra one way valves, recommendations on pipe size etc.

Thanks

Al

[peghall]

The Jabsco 37010 uses a 1" discharge fitting...1.5" is the standard inlet and discharge fittings on holding tanks. So it's normal to use a 1" x 1.5" adapter in Jabsco discharge lines connecting to a holding tank...it should be installed just a foot or two ahead of the tank, so you can install that much hose (sanitation hose, NOT "clearish" hose) to finish the run to the tank.

Nor should there be ANY valves in that line. I suspect the one-way valve was used because it's an uphill run from the toilet to the tank and the PO did that to block backflow...but that's not the best way to deal with that. Your toilet can lift up to 4' so I would put a loop--NOT a vented loop, just a loop in the hose--immediately after the toilet that's barely higher the top of the tank that does two things: provide some help from gravity to each flush and prevent backflow.

Next time you need some help from Jabsco, Paul Campagna is Jabsco's toilet guru...his direct line is 978.282.5246
Paul.campagna@xyleminc.com

I recommend that you call him instead of emailing...he gets so many that it may take forever for him to reply.


If you'd like more help from me, send me a PM.


--Peggie

[Chaff]

Wow thanks Peggie that's an amazing response!

A bit of work for me to get on with there then, and the contact details for support is really appreciated

Al