[C320-list] DUCKBILL VALVE IN VENTED LOOPS

[Karl Mielenhausen]

New file added...
http://www.catalina320.com/filemgmt_data/files/Marelon-Vented-Loops.pdf

Some handy maintenance tips are included.

On Mon, Aug 19, 2013 at 5:41 PM, Jeff Hare <catalina at thehares.com> wrote:
> Also, Defender.com has these as well.
>
> Forespar MF-841 Replacement Duck Bill / Cap Assembly   $9.99/ea
>
> -Jeff
>
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of JJ Morrison
> Sent: Thursday, August 15, 2013 9:36 AM
> To: Catalina List
> Subject: Re: [C320-list] DUCKBILL VALVE IN VENTED LOOPS
>
> There are 3 vented loops on my boat...one is in the port side cockpit locker
> and is on the hull side readily visible as two hoses connected by a Marelon
> loop at the top.This loop is for the raw water engine cooling system. The
> other 2 are in the head and visible behind the little mirrored cabinets.
> These two are the anti siphon loops for the head pump and macerator. There
> is a little Marelon nut on the top of the loop which screws off and contains
> the rubber duckbill valve. What this does is allows the line to be
> pressurized but prevents a vacuum from being formed and potentially
> siphoning water back into the boat. Have a look at this link for an
> explanation as to why vented loops are essential.
> http://www.myboatsgear.com/vented-loops
> CheersJohnM1999#574
>> From: rick at inflateco.com
>> Date: Thu, 15 Aug 2013 05:22:29 -0700
>> To: C320-List at Catalina320.com
>> CC: c320-list at catalina320.com
>> Subject: Re: [C320-list] DUCKBILL VALVE IN VENTED LOOPS
>>
>> What and where is this loop and valve, sounds like a potential problem.
> Want to check mine and buy spare . Don't like sinking
>>
>> Thank you and please excuse any grammatical and/or  typographical  as sent
> from iPhone.
>>
>> Rick Portanova | President | CEO
>> INFLATE CO, INC.
>> www.InflateCo.com
>> 949-340-0104 Office
>>
>>
>> On Aug 15, 2013, at 4:48 AM, JJ Morrison <sail-ability at sympatico.ca>
> wrote:
>>
>> > I had asked about procuring duckbill valves and I was not able to get
> them. Need to buy the cap with the valve in it...$13 CAD from Forespar.
> Related I had taken the duckbill out of the vented loop in the exhaust
> system to see if the Chandlery had them. We subsequently went out on the
> boat and the bilge pump came on and wouldn't shut off, water was pouring in.
> I tore the boat apart looking for the wet spot...nothing. I then opened the
> port cockpit locker and everything was soaked and a vicious stream of water
> was being pumped into the boat out of that  vented loop. The engine was shut
> down and the stream stopped of course...duh!! Luckily I had that tiny rubber
> valve in my pocket and put it in place.There's a lesson here!I'm in the
> process of replacing all three vented loops with new ones. The caps with
> valves are not expensive but just the rubber can't be more than
> 50cents!CheersJohnM1999#574
>>
>                                           =
>