poly under pressure yes or no

[greenmonster304]

just wondering how you guys feel about having a poly main under pressure?

[CAPT Stream Rotar]

what kind of pressure?

how big is the poly?

[greenmonster304]

1" or 1 1/4" 60-80 lbs. some guys say never put poly under pressure, always a master valve. how do you guys do it?

[CAPT Stream Rotar]

1" or 1 1/4" 60-80 lbs. some guys say never put poly under pressure, always a master valve. how do you guys do it?

Your sources are 100% wrong..Put in the master valve if it makes you feel better..I personally think master valves are for people who are sure of their work...

But, I am sure of the poly..we have over 700 accounts with maybe 50 MV's..I have never once installed a MV on a system with town water, or well.

Just remember with that kind of pressure double clamp your fittings and if its a main triple clamp..Make sure to catch all the barbs..I've worked on 50 GPM 2 inch poly all triple clamped...Never had a problem.
good luck green.

[greenmonster304]

thats how i feel, i put poly under pressure but i dont use crimp clamps i use the strap clamps on high pressure. the guy at the supply house was telling me about the m/valves. i dont really care for them my self

[CAPT Stream Rotar]

thats how i feel, i put poly under pressure but i dont use crimp clamps i use the strap clamps on high pressure. the guy at the supply house was telling me about the m/valves. i dont really care for them my self

I'm totally in that boat brotha..What do you mean strap clamps? You dont use pinch clamps?

are you talking about hose clamps?

[Dirty Water]

It depends on the type of Poly.

I'd never run that cheap crap you guys use for laterals as a main.

Out here, most service drops are poly, but they are 200 PSI rated, with 1/4" thick walls and packjoint fittings.

[greenmonster304]

the strap clamp is just what i call it i forget that other peaple call things by other names, they are really called lox on made by ideal here is the link

http://www.idealtridon.com/catalog/clamps/catalog.php?BID=27&ID=176&phrase_id=46347

[CAPT Stream Rotar]

dude you should use pinch clamps...

this is how i came off my main and wire for a zone of drip
check out the clamping..no poly main under that pressure will come off with this connection..
http://img443.imageshack.us/img443/6829/dscn1329nf4.jpg

[turfnh2oman]

The old rule of thumb is that polyethylene pipe is not to be used as main. Granted the main valve keeps full static pressure from accumulating in theory but ?? There are many reasons why poly is not supposed to be used as main, so my advice is to stick with what works. I sleep easy at night with good glue joints on PVC.

[CAPT Stream Rotar]

The old rule of thumb is that polyethylene pipe is not to be used as main. Granted the main valve keeps full static pressure from accumulating in theory but ?? There are many reasons why poly is not supposed to be used as main, so my advice is to stick with what works. I sleep easy at night with good glue joints on PVC.

Im sure installers in different parts of the US have different advice.

[SprinklerGuy]

I use poly mains.....I also use master valves under certain conditions....

[DanaMac]

Yeah, only use PVC for a mainline, because nothing can happen to PVC like a joint pulling apart and flooding a basement. :rolleyes:

We have many homes in our area with poly mains. There have been a few problems, not many. Problems were not due to poly pipe, but due to poor installation. I have done more PVC mainline repairs that you can imagine.

[Bill S]

I used to be a PVC man, not anymore! I had problems with one system, switch to poly and never looked back!

Though, anything above ground does look much better with PVC.

[FIMCO-MEISTER]

I used to be a PVC man, not anymore! I had problems with one system, switch to poly and never looked back!

Though, anything above ground does look much better with PVC.

What kind of problem?

[Mike Leary]

What kind of problem?

Nothing like poly risers!:cry:

[greenmonster304]

Yeah, only use PVC for a mainline, because nothing can happen to PVC like a joint pulling apart and flooding a basement. :rolleyes:

We have many homes in our area with poly mains. There have been a few problems, not many. Problems were not due to poly pipe, but due to poor installation. I have done more PVC mainline repairs that you can imagine.

i didn't suggest using poly in a basement thats just crazy. i only use copper in basements then change to poly outside.

[DanaMac]

I never said the poly or pvc was in a basement. I have another thread going, where a PVC mainline/manifold outside the house, broke loose at a fitting and flooded the basement. Could have happened just as easily with poly if not installed properly, which is how the pvc came apart.

[SprinklerGuy]

LOL.....he meant a poly main outside the house next to a basement window well....

We do it the same way you do......

[greenmonster304]

sorry for the confusion.

[Wet_Boots]

Poly risers? We don' need no steenking poly risers!http://img527.imageshack.us/img527/6158/safetlawnmatador8800xt9.jpg

[Mike Leary]

Poly risers? We don' need no steenking poly risers]

LOL What a great thread..even PVC risers suck, Oh, I guess you knew that.

[Rainman7]

dude you should use pinch clamps...

this is how i came off my main and wire for a zone of drip
check out the clamping..no poly main under that pressure will come off with this connection..
http://img443.imageshack.us/img443/6829/dscn1329nf4.jpg

Dude,your such a clown to make statements like that. You are not supposed to use standard 100psi poly for constant pressure mains. You should upgrade the main line to 160 psi aquajet or equiv.. If not you should use a MV.

By the way, the clamps on the right side of that connection dont look like they are on the barb. Maybe use 3 more clams to cover the end completely....just to be sure. I honestly think you care about and like what you are doing but I think you need a better teacher.


Greenmonster,
Those clamps you are talking about work great on poly over 1" and thats all I use on poly 1.5" and over(if I have to use poly). I know in the Hamptons you see alot of poly mains,manifolds,ect.. That doesnt make it right. I could never figure out how a hamptons co. could charge twice as much and do such low quality work. Most people out there are only there a few weekends a year, they know they are paying more but they want it right.

[greenmonster304]

"Greenmonster,
Those clamps you are talking about work great on poly over 1" and thats all I use on poly 1.5" and over(if I have to use poly). I know in the Hamptons you see alot of poly mains,manifolds,ect.. That doesnt make it right. I could never figure out how a hamptons co. could charge twice as much and do such low quality work. Most people out there are only there a few weekends a year, they know they are paying more but they want it right."

i think you are missinformed about the prices here. from what i gather from this sight the prices here are the about the same as everywhere else as far as installs.

[greenmonster304]

i would never make a manfold out of poly but you are right there is a lot of sh!t work here. its cut throat here so many contractors and a lot of them with know licence, insurance, and other overhead to raise there prices. i have seen a lot of guys who cut grass start doing irrigation because they think "oh i will just put some sprinklers in the middle of the lawn that will keep it green" and then install hunter src indoor clock outside and wonder why it didnt last the season.

[Wet_Boots]

A single clamp, on the barbs, is what fittings manufacturers will specify for one-inch insert fittings (and smaller) ~ I sometimes see splits in poly pipe, where it was clamped on the smooth 'shoulder' of an old-style fitting, and not on the barbs.

[CAPT Stream Rotar]

poly under pressure! ha i service 25 year old systems with inch and a quarter single clamped as a main for an entire 40 zone system...and this clown is saying all those years are wrong?

I mock you all who think like him.

[Wet_Boots]

I think it only takes a single clamp on the barbs to make a 'sealed' connection, but the forces that would blow out the connection have to be considered, and more clamps applied, depending on pipe size/material/thickness and water pressure.

[drmiller100]

like the man said, 100 psi mains are for hacks.
160psi, doubleclamped, is totally kosher.
national potable water code says you need two clamps opposite. there is probably a reason for that, and it is pretty easy to do.

so we do it.

[turfnh2oman]

I sleep easier with PVC mainlines put together properly. I'd rather know than wonder or take the chance.
Everyone has their own opinion. Doesn't mean they're either right or wrong, it's just their opinion - Capitan'.

[drmiller100]

i sleep better knowing i have poly pipe that won't break when it freezes, won't spiral crack when someone drives over it, and won't rub through by rocks.

everyone has their opinions, even if they are different then mine.

[CAPT Stream Rotar]

i sleep better knowing i have poly pipe that won't break when it freezes, won't spiral crack when someone drives over it, and won't rub through by rocks.

everyone has their opinions, even if they are different then mine.

I like the cut of your jib pal........


polymains4lyfe

[turfnh2oman]

Hey Doc,

Thanks and here, here. I definitly concur.

[turfnh2oman]

I'd like to retract that last post as I thought you were talking pvc.
We've all beat this subject to death. Can we start beating a new horse ?

[SprinklerGuy]

I guess I'm a hack.........:(

[CAPT Stream Rotar]

I guess I'm a hack.........:(

you just install according to your climate, and geographic location..


we are all right..and wrong..

::ends it::

[Mike Leary]

I like the cut of your jib pal..

Talk about us & pithy sayings!:laugh:

[CAPT Stream Rotar]

Talk about us & pithy sayings!:laugh:

and you are?

[Mike Leary]

and you are?

"If all begins with nothing, where is there for dust to collect?"

[CAPT Stream Rotar]

"If all begins with nothing, where is there for dust to collect?"


"STEP INTO THE FREEZER"

[Mike Leary]

"STEP INTO THE FREEZER"

Remember that Steve McQueen film, "Great Escape" where they sent him to
"the cooler"?; I guess that's where a few of us have to go to from time to
time. That's where SHE is.:cry:

[CAPT Stream Rotar]

Remember that Steve McQueen film, "Great Escape" where they sent him to
"the cooler"?; I guess that's where a few of us have to go to from time to
time. That's where SHE is.:cry:



The she=Owned outta the supply house 4life..


sad really, she was a good addition to this website and took a lot of heat.

[Mike Leary]

The she=Owned outta the supply house 4life..


sad really, she was a good addition to this website and took a lot of heat.

& gave a lot of heat, which was fine with me, too many thin-skinned folk
walk into these sites & can't handle constructive criticism, &, jeez, we all have
our opinions, but we all know when we've gotten so tweaked..prolly should
not have posted.:dizzy:

[CAPT Stream Rotar]

anyone who conversates on the internet should have thick skin..


this place =mickey mouse compared to other websites i post on.

[Mike Leary]

conversates

Did you just invent a new word?:waving:

[WalkGood]

"If all begins with nothing, where is there for dust to collect?"


“Originally there is no tree of enlightenment, nor is there a stand with a clear mirror. From the beginning not a single thing exists; where is there for dust to collect?”

[FIMCO-MEISTER]

A lot of the posters here need the same desktop I use

[WalkGood]

Did you just invent a new word?:waving:

Webster's New Millennium™ Dictionary of English - Cite This Source http://dictionary.reference.com/cite.html?qh=conversate&ia=wmde

Main Entry: conversate
Part of Speech: v
Definition: to socialize and chat; to converse with another
Etymology: back-formation from conversation
Usage: slang

Webster's New Millennium™ Dictionary of English, Preview Edition (v 0.9.7)
Copyright © 2003-2007 Lexico Publishing Group, LLC

[Hank Reardon]

I looked it up on www.urbandictionary.com.

[FIMCO-MEISTER]

I looked it up on www.urbandictionary.com.

I'll bite Hank. Let me improve da language

conversate
436 up, 126 down


A word used by backwards, ignorant, illiterate inner city trash who mean to say 'converse'. (Not those searching for blue pgp nozzles)

"Yo, I just needs to conversate witcha!"

To which I replied, "No, you need to _converse_ with me, you dumb sh-t-eating duckhead!"

[Hank Reardon]

I'll bite Hank. Let me improve da language

conversate
436 up, 126 down


A word used by backwards, ignorant, illiterate inner city trash who mean to say 'converse'. (Not those searching for blue pgp nozzles)

"Yo, I just needs to conversate witcha!"

To which I replied, "No, you need to _converse_ with me, you dumb sh-t-eating duckhead!"

I speak jive! <references the movie Airplane>

[CAPT Stream Rotar]

I support this thread...NOW.

[rkelachim]

Back when I was still in the business, we used 100 psi poly all the time for the main. Zero problems (not including the home owner induced gashes, i.e. running landscape stakes thorugh main).

Does anybody use 80 psi poly for main? Theoretically, you should have no problems - just wondering if anyone has extensive field experience to verify no problems with the 80 psi for main line.