Would you consider one of these?  SHURflo EXTREME™ Smart Sensor™ 4.0 Fresh
Water Pump

We have one and I really like it.  The variable speed feature is what makes
it a great pump.  If you run the tap slowly the pump just ticks over slowly
too so is very quiet, almost silent, especially appreciated at night when
someone is sleeping.

http://shurflo.com/marine-products/fresh-water-pumps/extreme-series-pumps/8-extreme-smart-sensor-4-0-fresh-water-pump-12vdc

The Smart Sensor™ 4.0 is designed specifically for cruisers and midsize
yachts. Delivering 4.0 GPM and pressure up to 50 PSI, this micro-controller
based variable speed pump precisely monitors your system’s water pressure
and adjusts the motor speed, eliminating the need for a pressure switch.
SHURFLO® engineered the Smart Sensor™ 4.0 with a superior four-chamber
design that incorporates large inlet and outlet passages to maximize water
flow and efficiency, providing a “Just Like Home” shower and quiet
operation.

Ken H.

C&C 37 XL Salazar

On 7 October 2015 at 10:48, Jean-Francois J Rivard via CnC-List <
cnc-list@cnc-list.com> wrote:

> Hi Paul,
>
> Between the two I'd go with the 2.9 based on the combination of flow / PSI
>  / Amps. The 2.9 needs a 10 amps circuit / breaker while the 3.5 needs a 15
> amp circuit.
>
> Your boat most likely has the 10 amp breaker, you'd have to at least
> change the breaker / possibly upgrade the wiring as well. Also, if you are
> counting amps while on the hook, the higher capacity pump will take a
> deeper cut into your batteries.
>
> That is also why I decided to rebuild  / stick with the original model
> 500736 pump on my boat. It's a little noisy but it's built like a truck,
>  easy to rebuild,  and makes 3.0 GPM  / 40 PSI on a 8 amp circuit /
> breaker.
>
>
> -Francois Rivard
> 1990 34+ "Take Five"
> lake Lanier, GA
>
>
> Hi,
>
> I am in the process of upgrading the fresh water plumbing on my boat.  The
> old fresh water pump was removed long before I obtain this project.  I am
> currently deciding between two pumps: a Jabsco Par-Max 2.9gal/min 50psi
> (31395-0092) and a Jabsco Par-Max 3.5gal/min 40psi (32600-0092).   The
> Par-Max 3.5 cost about 50% more.    I want to favor the Par-Max 2.9 to
> conserve water but I am interested to hear what other think about the 2.9
> gal/min flow being enough?
>
> Thanks for anyones input.
>
> -
> Paul E.
> 1981 C&C 38 Landfall
> S/V Johanna Rose
> Carrabelle, FL
> Regards
> ------------------------------
> *François Rivard* 4111 Northside Pkwy, Nw
> Big Data Black Belt Atlanta, 30327-3015IBM Sales & Distribution, Software
> Sales UsaMobile:770-639-0429 e-mail:jfriv...@us.ibm.com
>
>
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