Water pump (one more time)

[Pete Masterson]

Haven't talked to Microphor, but I got out my blue box and found the
Microphor booklet and found an exact description of my symptoms* in
the troubleshooting section. Possible cause was listed as water
pressure over 50 psi (and elsewhere in the booklet it mentioned that
the toilet was designed to work with water pressure of 30 to 50 psi).
We're on a lengthy trip -- left 4/1 and don't expect to be home much
before 6/10 -- so it's not convenient to take the plumbing off-line
for modification. I found a shut-off valve and water supply line to
the toilet in the bottom of the bathroom closet (in my configuration)
so I can easily cut the line and insert a pressure limiter there. (I
actually have an adjustable model with pressure gauge from a drip
irrigation system I no longer have in operation that I'll probably use.)

The toilet does not exhibit any problems on "shore water" (pressure
limited to about 40 psi), so I'm quite certain that it's the 65 psi
pressure from the pump.

The "work around" I've come up with is to open the faucet on the
bathroom sink, then immediately hit the flush lever for the toilet.
The variable speed pump has a very short delay before it senses the
pressure drop and kicks on -- it's just enough time for the Microphor
to start its cycle.

*Symptoms: Fails to open the flap valve (does not flush). If the flap
valve opens and closes (a flush occurs), then the toilet bowl does
not refill with water and/or the water does not flow to 'wash' the
sides of the toilet bowl.

Pete Masterson
'95 Blue Bird Wanderlodge WBDA 42
aeonix1@...
On the road at



On May 1, 2007, at 2:41 PM, Curt Sprenger wrote:

> Pete,
> Please keep us posted on the above 50# water pressure. What are you
> experiencing? Have you talked with Microphor? I purchased the same
> pump
> you have, just haven't installed it yet.
>
> Curt Sprenger
> 1987 PT38 8V92 "MacAttack Racing"
> Anaheim Hills, Calif.
>
>
>
> Pete Masterson wrote:
>
>> THe original pump in my coach provided 40-45 lbs pressure. I
>> installed a ShurFlo variable speed pump that provides 65 lbs
>> pressure. The coach plumbing seems to be 'up' for this although I
>> have an anomaly with the Microphor toilet (it doesn't like pressure
>> above 50#). Mostly, the higher pressure gives you a better "user
>> experience" when you take a shower. The variable speed pump also
>> eliminates the need for the accumulator (expansion) tank.
>>
>> Pete Masterson
>> aeonix1@...
>> '95 Blue Bird Wanderlodge WBDA 42'
>> El Sobrante, CA
>>
>> O
>>
>>
>>
>>
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