Head trip - "Pipe down, you'se guys!" he said Archly
 

Curiouser and curiouser...

I'm on the trail of doing an arch, and I learned that many first make
mockups with plastic PVC conduit before getting into cutting the tubing to
actually make them. I went to check it out and found that the conduit is
actually Schedule 40 grey pipe. I can't imagine why something just to
contain electrical wire would have to be S40, but it was.

It's got lovely sweep elbows, with nipple-type (wide end to glue up to pipe
end) Street El fittings, and it's very inexpensive.

So, my question is, would this work for the Schedule 40 pipe installations
in sanitary service, as specified by the SeaLand folks (who make the
fittings to match up to them so you can get the hose on the non-pipe
section)?

Is the conduit the same size as the PVC pipe, or, perhaps, is one of them an
ID and the other an OD measurement?

Just thinking of how I might maximize my purchase and minimize my travels
:{))

L8R

Skip and Lydia, off to work on the boat next week...

--
Morgan 461 #2
SV Flying Pig
http://tinyurl.com/384p2

"Twenty years from now you will be more disappointed by the things you
didn't do than by the ones you did do. So throw off the bowlines. Sail
away from the safe harbor. Catch the trade winds in your sails. Explore.
Dream. Discover." - Mark Twain

On Sat, 9 Oct 2004 13:36:26 -0400, "Skip Gundlach" skip sez make this
all one word with my last name next to my first gundlach@adelphia dot
fish catcher net (sorry bout the spamtrap!) wrote:

Curiouser and curiouser...

I'm on the trail of doing an arch, and I learned that many first make
mockups with plastic PVC conduit before getting into cutting the tubing to
actually make them. I went to check it out and found that the conduit is
actually Schedule 40 grey pipe.
//
It's got lovely sweep elbows, with nipple-type (wide end to glue up to pipe
end) Street El fittings, and it's very inexpensive.

So, my question is, would this work for the Schedule 40 pipe installations
in sanitary service,
//
Is the conduit the same size as the PVC pipe, or, perhaps, is one of them an
ID and the other an OD measurement?
//
L8R

Skip and Lydia, off to work on the boat next week...

Walking around the local ACE hardware, I picked up a water elbow in 2
inch and fitted it snugly to a two inch grey electrical sch 40
conduit.

I deduce that the electrical conduit is intended for above ground use
and is sunlight resistant.
I am not sure that the plastic plumbing has much UV resistance at all.

That seems like the principal difference that jumped out at me.

Brian Whatcott Altus OK

"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.