"Skip Gundlach" writes:

I went to check it out and found that the conduit is
actually Schedule 40 grey pipe.

As far as the pipe size is concerned, correct.

Fittings are a different matter.

So, my question is, would this work for the Schedule 40 pipe installations
in sanitary service,

Negative.

Sch 40 pipe (white PVC), ABS (Black) and sch 80 pipe (gray PVC), are rated
for sanitation service, but who in their right mind would put it on a boat?

White PVC has no UV inhibitors and if left in the sun, will probably
fracture in less than 1 year in a place like SoCal or Fla.

Conduit and Sch 80 pipe both have UV inhibitors.

HTH

Lew

Actually the engineers at Sealand and Raritan have no objection to Sched 40
PVC. In fact Sealand recommends it over hose. Much less subject to odor
permeation. Just use short lengths of hose between the pipe and the
fixtures and tanks to handle movement.

Being located down in the bilge and behind cabinet work, if sunlight gets to
the pipe UV degradation is the least of your worries. :-)


"Lew Hodgett" wrote in message
ink.net...

"Skip Gundlach" writes:

I went to check it out and found that the conduit is
actually Schedule 40 grey pipe.

As far as the pipe size is concerned, correct.

Fittings are a different matter.

So, my question is, would this work for the Schedule 40 pipe
installations
in sanitary service,

Negative.

Sch 40 pipe (white PVC), ABS (Black) and sch 80 pipe (gray PVC), are rated
for sanitation service, but who in their right mind would put it on a
boat?

White PVC has no UV inhibitors and if left in the sun, will probably
fracture in less than 1 year in a place like SoCal or Fla.

Conduit and Sch 80 pipe both have UV inhibitors.

HTH

Lew

"Glenn Ashmore" writes:
Actually the engineers at Sealand and Raritan have no objection to Sched
40
PVC. In fact Sealand recommends it over hose. Much less subject to odor
permeation. Just use short lengths of hose between the pipe and the
fixtures and tanks to handle movement.
snip

The potential for leaks increases geometrically with the number of
connections.

A simple of hose has two (2) process connections.

Replace with a piece of PVC pipe and a short length of have on each end, you
have 4 process connections.

Maybe on a stink boat, but never on mine.

I'll stay /w/ hose and replace as needed.

Lew

On Wed, 13 Oct 2004 17:02:40 GMT, "Lew Hodgett"
wrote:


"Glenn Ashmore" writes:
Actually the engineers at Sealand and Raritan have no objection to Sched
40
PVC. In fact Sealand recommends it over hose. Much less subject to odor
permeation. Just use short lengths of hose between the pipe and the
fixtures and tanks to handle movement.
snip

The potential for leaks increases geometrically with the number of
connections.

A simple of hose has two (2) process connections.

Replace with a piece of PVC pipe and a short length of have on each end, you
have 4 process connections.

Maybe on a stink boat, but never on mine.

I'll stay /w/ hose and replace as needed.

Hi,

I'd have thought wrapping the hose with foil tape would take care of
any permeation problems.

cheers,
Pete.

Subject: Head trip - "Pipe down, you'se guys!" he said Archly
From: "Lew Hodgett"

Sch 40 pipe (white PVC), ABS (Black) and sch 80 pipe (gray PVC), are rated
for sanitation service, but who in their right mind would put it on a boat?

White PVC has no UV inhibitors and if left in the sun, will probably
fracture in less than 1 year in a place like SoCal or Fla.

Who in their right mind would run their sanitation hose on the outside of their
boat? :-)

Capt. Bill