Empathy List Archives

M

mknott@bcpl.net

Fri, Dec 29, 2000 1:35 PM

===== Original Message From MV Journey fl2407dg@yahoo.com =====
I received a Blaster Series wash-down pump from Santa.
I do not want to put another hole in the bottom or
the boat so I was thinking about Teeing the new pump
into the existing salt water intake for the head. I
am thinking that check valves would be required on
both sides of the tee lest one pump would try to suck
the other dry. Am I on the right track?

I was thinking about doing the same thing - teeing off the head intake for a
washdown pump. I've heard of numerous others doing this. I've never heard of
anyone mentioning the need for check valves. The head intake is below water
with a certain amount of pressure - take the head intake hose off and
momentarily open the valve and you'll see a geyser. I doubt that there should
be any concern for adequate supply to both fixtures.

Mel Knott
Sandpiper
West Indian 36
Annaplois, MD

>===== Original Message From MV Journey <fl2407dg@yahoo.com> ===== >I received a Blaster Series wash-down pump from Santa. > I do not want to put another hole in the bottom or >the boat so I was thinking about Teeing the new pump >into the existing salt water intake for the head. I >am thinking that check valves would be required on >both sides of the tee lest one pump would try to suck >the other dry. Am I on the right track? > I was thinking about doing the same thing - teeing off the head intake for a washdown pump. I've heard of numerous others doing this. I've never heard of anyone mentioning the need for check valves. The head intake is below water with a certain amount of pressure - take the head intake hose off and momentarily open the valve and you'll see a geyser. I doubt that there should be any concern for adequate supply to both fixtures. Mel Knott Sandpiper West Indian 36 Annaplois, MD

R

rcrogers@annapolis.net

Fri, Dec 29, 2000 3:43 PM

Mel, without the intake check on the WC line, you open the possibility of
drawing water from the toilet bowl.

----- Original Message -----
I've never heard of anyone mentioning the need for check valves. The head
intake is below water

with a certain amount of pressure - take the head intake hose off and

momentarily open the valve and you'll see a geyser. I doubt that there
should

be any concern for adequate supply to both fixtures.

Mel, without the intake check on the WC line, you open the possibility of drawing water from the toilet bowl. ----- Original Message ----- I've never heard of anyone mentioning the need for check valves. The head intake is below water > with a certain amount of pressure - take the head intake hose off and momentarily open the valve and you'll see a geyser. I doubt that there should > be any concern for adequate supply to both fixtures.

S

scaramouche@tvo.org

Fri, Dec 29, 2000 3:50 PM

rcrogers@annapolis.net writes:

Mel, without the intake check on the WC line, you open the
possibility of
drawing water from the toilet bowl.

Now that would be an interesting cleaning fluid for a deck-washdown,
eh?

rcrogers@annapolis.net writes: >Mel, without the intake check on the WC line, you open the >possibility of >drawing water from the toilet bowl. Now that would be an interesting cleaning fluid for a deck-washdown, eh?

R

rmcleran@ix.netcom.com

Fri, Dec 29, 2000 4:32 PM

Mel, does this mean you'd tee off the intake right at the intake valve?
I assume you'd want the tee below the water line, at least, in order to
have seawater in the washdown pump line.

mknott wrote:

I was thinking about doing the same thing - teeing off the head intake for a
washdown pump. I've heard of numerous others doing this. I've never heard of
anyone mentioning the need for check valves. The head intake is below water
with a certain amount of pressure - take the head intake hose off and
momentarily open the valve and you'll see a geyser. I doubt that there should
be any concern for adequate supply to both fixtures.

--
Bob McLeran rmcleran@ix.netcom.com
M/V "Sanderling" Docked at Point Patience Marina
Hailing port: Wianno MA Solomons, MD
Hampton 35 Trawler

Mel, does this mean you'd tee off the intake right at the intake valve? I assume you'd want the tee below the water line, at least, in order to have seawater in the washdown pump line. mknott wrote: > > I was thinking about doing the same thing - teeing off the head intake for a > washdown pump. I've heard of numerous others doing this. I've never heard of > anyone mentioning the need for check valves. The head intake is below water > with a certain amount of pressure - take the head intake hose off and > momentarily open the valve and you'll see a geyser. I doubt that there should > be any concern for adequate supply to both fixtures. > -- Bob McLeran rmcleran@ix.netcom.com M/V "Sanderling" Docked at Point Patience Marina Hailing port: Wianno MA Solomons, MD Hampton 35 Trawler

S

stevena48@earthlink.net

Fri, Dec 29, 2000 5:50 PM

I have done exactly that - taken washdown water off the saltwater feed line
to the head without any problem. However, our heads are manual pump types
although I can't see how that would make any difference.

----- Original Message -----
From: "mknott" mknott@bcpl.net
To: "MV Journey" fl2407dg@yahoo.com; "trawler-world-list"
trawler-world-list@samurai.com
Sent: Friday, December 29, 2000 5:35 AM
Subject: RE: TWL: SW Source for Deck Washdown

===== Original Message From MV Journey fl2407dg@yahoo.com =====
I received a Blaster Series wash-down pump from Santa.
I do not want to put another hole in the bottom or
the boat so I was thinking about Teeing the new pump
into the existing salt water intake for the head. I
am thinking that check valves would be required on
both sides of the tee lest one pump would try to suck
the other dry. Am I on the right track?

I was thinking about doing the same thing - teeing off the head intake for

a

washdown pump. I've heard of numerous others doing this. I've never

heard of

anyone mentioning the need for check valves. The head intake is below

water

with a certain amount of pressure - take the head intake hose off and
momentarily open the valve and you'll see a geyser. I doubt that there

should

be any concern for adequate supply to both fixtures.

Mel Knott
Sandpiper
West Indian 36
Annaplois, MD

I have done exactly that - taken washdown water off the saltwater feed line to the head without any problem. However, our heads are manual pump types although I can't see how that would make any difference. ----- Original Message ----- From: "mknott" <mknott@bcpl.net> To: "MV Journey" <fl2407dg@yahoo.com>; "trawler-world-list" <trawler-world-list@samurai.com> Sent: Friday, December 29, 2000 5:35 AM Subject: RE: TWL: SW Source for Deck Washdown > >===== Original Message From MV Journey <fl2407dg@yahoo.com> ===== > >I received a Blaster Series wash-down pump from Santa. > > I do not want to put another hole in the bottom or > >the boat so I was thinking about Teeing the new pump > >into the existing salt water intake for the head. I > >am thinking that check valves would be required on > >both sides of the tee lest one pump would try to suck > >the other dry. Am I on the right track? > > > I was thinking about doing the same thing - teeing off the head intake for a > washdown pump. I've heard of numerous others doing this. I've never heard of > anyone mentioning the need for check valves. The head intake is below water > with a certain amount of pressure - take the head intake hose off and > momentarily open the valve and you'll see a geyser. I doubt that there should > be any concern for adequate supply to both fixtures. > > Mel Knott > Sandpiper > West Indian 36 > Annaplois, MD > > >

R

rcrogers@annapolis.net

Fri, Dec 29, 2000 6:13 PM

It is my recollection that the Groco unit instructions make a point
concerning the limited ability of the unit to self-prime. That is why the
intake check valve is required. Anti-bowl sucking is a side benefit. The
Groco unit that comes mounted on a Delrin plate has their check valve last
in-line before the output hose. This does not mean that other brands require
the same setup.

It is my recollection that the Groco unit instructions make a point concerning the limited ability of the unit to self-prime. That is why the intake check valve is required. Anti-bowl sucking is a side benefit. The Groco unit that comes mounted on a Delrin plate has their check valve last in-line before the output hose. This does not mean that other brands require the same setup.

trawlers@lists.trawlering.com

RE: TWL: SW Source for Deck Washdown