The 4.0 and 5.7 are the same design. The only difference is the gallons per minute water delivery. The design of both pumps has been changed. The only way you can tell the difference is the pump housing itself, not the whole pump as the motor housing stayed the same. Give Shurflo a call. They will be more than happy to answer all of your questions. Depending on who you talk to, they tend to question your application as to if you have a accumulator tank or not. Instead of answering, ask them what do they recommend. I know of one person who has a RO water system and uses a accumulator tank. Shurflo does not recommend the use of a accumulator tank, but told that person it was ok.
Chuck B
Boni Pienups <wt7z@yahoo.com> wrote:
Hi, Again,
After reading posts on this subject, I have questions. First of
all, we have the Smart Sensor 4.0, not 5.7. I am questioning if the
4.0 has been changed also. I looked at the Shurflo website, and
didn't see any mention of redesign. I looked at the documentation
for the 4.0 and 5.7, and they both were still dated 2005. If there
has been a redesign, I would like to talk to them about it. They
always maintained that they never had people with problems like
ours, but kept replacing our pump with new ones. Any help would be
appreciated. Boni
--- In Diesel-RVs@yahoogroups.com, Boni Pienups <wt7z@...> wrote:
>
> We have had really bad luck with the Shurflo Smart Sensor 5.4.
Lots of posts on the internet, including mine. But, gist of it is,
bought with a $100 gift certificate from Camp World, and it still
wasn't worth the money. In 3 years, had it replaced by Shurflo 3
times (for free, the company is very good about replacement). We
did everything the instructions said-the better we made our system,
the worse the pump worked. We now have one that is almost as good
as good ole OEM. Just our experience.
>
> Boni Pienups
> Fulltiming, It's not a trip, It's a life
> wt7z@...
>
> ---------------------------------
> Never miss a thing. Make Yahoo your homepage.
>
> [Non-text portions of this message have been removed]
>
Chuck & Mary Boros
04 Windsor 02 Ford Ranger
Shelby Dog, Miss Kitty, Mr Lucky Cat
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