Water pump (one more time)

[Pete Masterson]

On May 1, 2007, at 4:19 PM, David Brady wrote:

> I called Shurflo and they specified that the pump should have
> at least 18 inches of elbow free tubing both at the inlet and
> at the outlet. I have much more than that. I don't use any strainer
> at all.

Ok... so there's no restriction on either side of the pump. I'm a
"belt and suspenders" type guy, so I installed the strainer filter
even though the old pump strainers didn't seem to have any debris in
them. Still, if something gets into the tank or plumbing (perhaps
from work on the system), then nothing will get into the pump itself
to foul it with the strainer present.

> <snip>To quiet the pump even further I mounted it using a
> Jabsco vibration pad kit, part number 43990-0058. These legs
> provide much more vibration dampening than the original
> Shurflo legs. The pump is virtually silent.

I'll have to look into that. I'm not annoyed by the small amount of
noise that gets through, but it would be nice if the pump were truly
"silent" as was the case with the old pumps I replaced.


> I do have aquahot.
> What I experience, especially on hot water, is: as the hot water
> is turned on, the pump ramps up, stops, ramps up again, stops,
> and again. It may do this half a dozen times before it settles down.

Wow... this is nothing like my experience. Water tap on ... slight
lag, (less than a second) then the pump kicks in -- it ramps up its
speed at a fairly even pace. No on-off, on-off ... simply slow,
medium, then full speed. Close tap. Pump stops almost immediately. No
temperature variations and no significant pressure variation as it
starts up (the pressure has to drop a certain amount for the pump to
turn on). Only problem is if someone else starts using water while
the shower is in use... then a pressure swing can cause noticeable
temperature variation. Loud shouting seems to change the behavior of
other water user in that case. (Also, a reminder that I, too, can
turn on the hot water in the kitchen when _she's_ in the shower!)

You might want to check the pressure sensor on the pump... it may be
defective or mis-adjusted.


<snip>


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