T&T: A/C pump - intake - problems/Remedy?

[Jeff Barfett]

Hi Bob,

I have a manifold off a 1.5" through hull and strainer that feeds two AC
pumps and the refer. An additional port has a valve with pressure fresh
water along with a high pressure check valve. I have used this to great
advantage to clear the strainer and inlet along with priming the AC pumps
when needed. At the time it was easier to plumb the fresh water than bring a
wash down connection back and I have plenty of fresh water storage aboard.
Someone on another list uses compressed air with excellent results.

Yours is an excellent project!

Jeff

-----Original Message-----
From: Bob Clinkenbeard [mailto:clinkenbeardb at bellsouth.net] 
Sent: Tuesday, July 10, 2007 6:20 PM
To: trawlers-and-trawlering at lists.samurai.com
Subject: T&T: A/C pump - intake - problems/Remedy?

Install a back flush fitting to the AC raw water inlet so that a raw water 
washdown hose can be fitted when needed.

I am an above water kind of guy and love marine life when it surfaces or see

it on the TV.  Diving under the boat is not an option most anytime, unless 
it is a real emergency.
So...
Since the Ac intake is vulnerable to clogging, mostly when not under way, 
wouldn't it be a good idea to install a tee with a hose fitting or such 
above the seacock for the AC intake....and maybe an additional valve above 
it to force a washdown pump and hose flush down and out the intake strainer?
Unless someone thinks this is a bad idea, I am going to install my intake 
that way since I am adding marine AC.

Bob Clinkenbeard
24' custom trailer trawler
http://home.bellsouth.net/p/PWP-aboardbobbinalong




> Had the same problem once with a big fat 10 inch diameter jelly fish.
> Sucked hard against the intake. It was 95 degrees at 10pm, so I was
> directed to go overboard with a mask and a flashlight in a zip lock bag.
> Pays to know the general location of your intakes!
>
> Alec
>
> it's also tricky...  if you open the seacock and strainer, you will get
> some flow out.  but when you start the pump, the suction sucks the bag
> tight
> against and stops flow.    back flushing doens' help, as the bag is
> usuallyt
> hooked on barnacles on the scoop...
>
> I almost changed a pump a few years ago but went under to take a look as
> a last resort...
>
> pascal
> miami, fl
> 70 hatteras 53MY
>
>
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