[C320-list] PSS question

[Greg Arnold]

My memory is that at one time PYI sold two versions of the PSS -- one 
with and one without a hose barb.  I sailed for many years on a 
club-owned Catalina 400 with no barb, with no problems.  I asked the PYI 
fellow about this at an Annapolis boat show a decade ago, and he said:  
No worries,  you didn't need the barb for slower boats.  But then PSS 
dropped the barb-less model, and you could only purchase one with a hose 
barb.  So everyone installed the hose.  Now, PYI is selling a plug for 
slower boats, so we seem to be back to where we were before.

I don't much like the hose barb, because it is a hole below the 
waterline that has no valve to turn off the water.  Also, on my boat at 
least, when you remove the raw water impeller, the water back flows from 
the PSS through the system and comes out of the raw water pump (this is 
when the thruhull is closed).  Water also can come out of the sea water 
strainer if the blades on the impeller are not good.

I think you only have this problem if the hose from the PSS ties into 
the raw water hose below the waterline.  Above the waterline and you are 
OK.

2005 #1054



On 2/21/2023 6:22 AM, Bruce Heyman wrote:
> Hi Greg,
> I have no idea but I don't think it takes much to allow the mating surfaces to be running dry.  I also don't know if the turbulence of the spinning shaft doesn't eliminate the air in fairly short order.
> Best,
> Bruce
> Bruce Heyman
> Somerset #671   San Pedro (LA) California
> -----Original Message-----
> From: C320-list<c320-list-bounces at lists.catalina320.com>  On Behalf Of Greg Arnold via C320-list
> Sent: Monday, February 20, 2023 6:06 PM
> To:C320-List at Catalina320.com
> Cc: Greg Arnold<greg-arnold at gmx.com>
> Subject: Re: [C320-list] PSS question
>
> I wonder how much air ends up there after the diver cleans the bottom.
>
>
> On 2/20/2023 6:02 PM, bruceheyman wrote:
>> Hi Greg,
>> I wanted the vent hose as I always forget to burp it after the diver
>> cleans the bottom.
>> Bruce
>> Somerset #671 San Pedro, CA
>>
>>
>>
>> Sent from my Verizon, Samsung Galaxy smartphone
>>
>>
>> -------- Original message --------
>> From: Greg Arnold via C320-list<c320-list at lists.catalina320.com>
>> Date: 2/20/23 17:41 (GMT-08:00)
>> To:C320-List at Catalina320.com
>> Cc: Greg Arnold<greg-arnold at gmx.com>
>> Subject: Re: [C320-list] PSS question
>>
>> PYI sells a plug that replaces the hose barb.  No need to vent on
>> boats as slow as ours:
>>
>> https://store.pyiinc.com/products/pss-hose-barb-plug
>>
>> Greg
>> Santa Barbara, CA
>> 2005 C-320 #1054
>>
>>
>>
>>
>> On 2/20/2023 3:47 PM, Martin Rosenberg via C320-list wrote:
>>> The seal requires water in it to keep it cool.
>>> The vent hose merely assures that it stays wet and does not air-lock
>>> and dry.
>>> I tied mine as high as I could and secured it with a tie wrap.
>>> It was nice to not need to burp it when I launched the boat.
>>> Marty Rosenberg
>>>
>>> On Mon, Feb 20, 2023 at 5:10 PM Bruce Heyman via C320-list <
>>> c320-list at lists.catalina320.com> wrote:
>>>
>>>> Hi Hugh,
>>>> We just made that change last August.   The shipyard went with
>>>> going forward and getting it as high as possible in the engine
>> compartment while
>>>> staying on the center line of the vessel.   I figured if that point
>> is ever
>>>> below the waterline we have serious problems.
>>>> Bruce
>>>>
>>>> Bruce Heyman
>>>> Somerset #671   San Pedro (LA) California
>>>>
>>>> -----Original Message-----
>>>> From: C320-list<c320-list-bounces at lists.catalina320.com>   On Behalf
>>>> Of Hugh Blackman via C320-list
>>>> Sent: Monday, February 20, 2023 1:48 PM
>>>> To:C320-List at catalina320.com
>>>> Cc: Hugh Blackman<sailvancouver at me.com>
>>>> Subject: [C320-list] PSS question
>>>>
>>>>  Hi group,
>>>> Replacing my PSS seal with a vented one. Any thoughts on where to
>> run the
>>>> burp hose?
>>>> Aft into lazerette locker or forward in engine compartment?
>>>> Thanks!
>>>> Hugh
>>>> Eeyore (formerly Iona)
>>>> Cat 320 #641
>>>>
>>>> Sent from my iPhone
>>>>
>>>>