Pipe line quick disconnect 1

[johnwill65]

I am loking to be able to disconnect a 6" PVC pipe from its fitting inside a 'dry' manhole at both sides of the manhole, with the intention of cleaning/ tv-ing the pipe line between manholes (this is a pressure main). Instead of flanges or some other type of cumbersome and time consuming method of removing the section of pipe within the manhole, to access the line on either side, I am wondering if there isn't some sort of 'quick-disconnect' that I can use here. This cleaning will be done at least twice per year, over about 8 or 9 manholes, on an active line (obviously not when were doing this--it will be bypassed). Thank you for your help.

 

[LHA]

Grinder pumps in small sewage pump stations have such a quick disconnect, which is disengaged from the deck opening without getting in the wet well. It is on the discharge end, so that fitting will work under pressure. I believe it is an integral part of the pump discharge. Maybe you can inquire about the connection alone, but I never have. I know Hydromatic and Goulds pumps have them, but I'm sure most others also do.

Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve

 

[cvg]

http://www.victaulic.com/

try this

 

[cvg]

http://www.dressercouplings.com/

try this also which may be more suitable for PVC

 

[dicksewerrat]

Try Bauer clamps? Look at the quick disconnect fittings on dewatering pumps and hoses.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[bimr]

Not sure what you are doing, but hhy don't you just install some pipe cleanouts? Use a Y fitting to bring the pipe to grade with a cleanout at the surface. If you have to clean the pipes that frequently, it would probably be worthwhile.

A cleanout is a pipe that leads from the sewage system to the surface of the ground, giving you or your plumber easy access to the sewer.

 

[stanier]

Victaulic make an overcentre locking coupling. I am unsure if the PVC pipe people make a Victaulic coupling in the USA.

 

[LHA]

If you put a CO on a pressure main like bimr suggests - something I've never seen - I would make sure you don't require an air release of some type, to prevent vapor lock.

Also, some type of locking cap would be a must, to prevent some poor soul from getting a bath...like on a wellhead?

Again, I've never seen it done, but I would research some existing applications first before I sealed a plan with a CO on a pressure main.



Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve

 

[semo]

Can you install a permanent wye with a ball (full port) valve on it? Something like the primative diagram below. You can open the ball valve when needed to feed the cleaning/tving equipment into the line?

\\
x
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===--===

 

[bimr]

lha,

What I described as a clean-out is not a gravity connection. It is just a Y stub up to the ground surface. The proposed "clean-out" would have to be made with the same pipe materials as the force main. Probably would look somewhat similiar to a pig launcher.

Not sure what you are saying about air locks. Why would you have an air lock? The fluid would force the air through the pipe. This would be the same occurence every time the pipeline commences operations after cleanings.

Can't read too much into this as little information is known about the pumped fluid, exposure to weather, pressures, etc.