Water Line too Small 3

[cieg22]

I'm finalizing a design for a single family home on a busy road. It's a long story, but part of the water connection was installed a while back - a 3/4" line running from the main to a curb box. Since then, the design grew. There are more fixtures now, and the demand exceeds a 3/4" line.
We are considering using a 1" or 1.25" pipe for the remainder of the connection (from the curb box to the meter). Any recommendations, notes for special consideration or warnings about this would be appreciated.

Thx.

 

[cvg]

check with the city, they may charge your client considerably more for the 1.25 inch meter. If you really need larger, you probably should extend the 1.25 inch pipe all the way to the mainline.

 

[cieg22]

Thanks for the response. The problem is that extending the larger line all the way out will involve closing down a busy road. Would you mind explaining why we probably should redo the full line?

 

[dicksewerrat]

You will have lower flows than you want in the house. Especially if two or more fixtures are running. the city also may not allow the increase at the stop box. As CVG said check with the city first.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com

 

[bimr]

You need to confirm the pipe size from the residence. 3/4" used to be the normal size, but many are now requiring a larger size.

If the pipe is on the other side of the road, you may be able or required to push the line under the road.

Here is a typical town ordinance:

"Wherever water service pipes between the curb box or valve and the metering device are found by the water department to be in such deteriorated condition that repair would not assure that unreasonable waste of water or frequent disruption of water service would not continue, new service pipes shall be installed at the expense of the owner of the premises served by such pipes in accordance with specifications on file in the Village offices. In the event the service pipes to be replaced are found to be connected with other service pipes, the Village shall install new service pipes tapped or connected directly to the water main and the Village shall have the right to enter the property to complete said installation. Replacement of water service pipes for the purpose of upgrading or increasing in size is the responsibility of the owner of the premises. All replacements must be from metering device to main in cases of upgrading or size increases.(Ord. No. 2942, § 1.) "


" "a) Water Service Pipe Sizing. The water service pipe from the street main (including the tap) to the water distribution system for the building shall be sized in accordance with Appendix A, Tables M, N, O, P and Q. Water service pipe and fittings shall be at least one (1) inch diameter. If flushometers or other devices requiring a high rate of water flow are used, the water service pipe shall be designed and installed to provide this additional flow.""

 

[CarlB]

Local authority In Anchorage AK also allows 3/4" up to properrty line, then a larger line to building, but requests calculations that show adequate flow/pressures will be supplied. New services are 1" minimum, but there are plenty of older 3/4" services in place. I'm sure there are common adapters/fittings that make the transition; local jurisdiction probably has some preferences.

 

[RWF7437]

If you plan to size this water service yourself buy, or borrow, a copy of AWWA Manual of Practice, M22. In it you will find examples of all the factors you may need to consider.

Some water systems do NOT size meters or services for their customers. The reason they avoid this practice is that by doing the sizing they would assume a responsibility for the adequacy of the service. This is a potential liability many water suppliers would prefer to avoid.

good luck

 

[jartgo]

as bimr suggested, whatever you decide, you should be able to pop these smaller diameter lines under the roadway without effecting the road at all. Whoever owns the road (town, county, state DOT, etc.) should be able to tell you if they'll allow it.