Laundry Room

[mrvixx]

I am going to add a laundry room to my house laundry room will be an addition to the back of the house behind the kitchen. Can i run water and drain pipes from under the foundation? and is it ok to use copper pipes for this or what is the best way to do this? I need to know what is the best way of making a drain pipe to the main sewer. I will probably get a plumber to do this but I need to know before I start building. sewer line is about 10 feet away.

Thanks in advance

[LazyPup]

Will the laundry room be on a slab or a wood floor with a crawl space underneath?

All Pipes passing through the masonary wall must be sleeved. To make a sleeve you first install a piece of PVC pipe at least two nominal trade sizes larger than the desired pipe running through the wall and extending out 1 to 3 inches on either side. The sleeve may be sealed to the masonary by any convenient means (mortar, tar pitch, cast in the concrete, expansion foam, etc.) The desired pipe is then run through the sleeve and the space between the inside wall of the sleeve and the outside wall of the desired pipe is filled with expansion foam.

Both the Hot and Cold water supply lines could be put through one common sleeve.

You may use copper pipe to run the water lines, but if the copper is running under a slab it may not be soldered. Under a slab you must make all joints using brazed wrought-copper fittings.

All copper joints above grade must be made with lead free solder, and some local codes require the use of water soluable flux. (Check your local code enforcement authority).

All supply lines must have line stops at the fixture. (Washing machine faucetts or angle stops under the sink.)

Auxillary water hammer arrestors are required on the water supply lines in the near proximity of all fast acting valves (Washing machine valves, dishwasher valves, ice maker valves, water softener valves or any device having an electrical solenoid activated valve).

The washing machine, or a washing machine and laundry tub group require a 2" diameter waste line. If the drain line is passing under a slab the underslab portion must be 3" diameter.

There must be a cleanout fitting on the upstream end of the horizontal drain line under the floor. If the line is to be under a slab or not sufficient clearance for access under the floor in a crawl space it may be run to the outside wall of the addition and a cleanout placed in the new footer wall.

The connection from the horizontal drain line to the vertical riser MUST BE MADE with a sanitary Wye & 1/8th bend (sanitry 45 deg. fitting) or a combo. (A combo is a combination of the sanitary Wye & 1/8th bend made in one fitting.)

If the horizontal run under the floor is a 3" line and the riser to the laundry group is 2" you would not be required a vent, However, if the horizontal run is 2" diameter you would have to install an auxillary vent through the roof.

The vertical vent riser could be reduced to 1 1/2 inches once it is 6" above the highest fixture flood level rim served. (6" above the laundry sink top or the washing machine standpipe, whichever is higher).

At a point at least one foot inside the attic space the vent would have to be enlarged to 3" diameter and run up through the roof at least 1" above the finished roof.

The horizontal distance from the laundry sink trap to the vertical waste line may not exceed 30".

You must have a horizontal waste arm from the vertical stack to the Washing machine standpipe a minimum of 2x the trap diameter. (Trap diameter is 2" therefore the minimum length of the waste arm from the stack to the trap weir must be 4")

The standpipe must have a P-trap. The p-trap must be accessible for service and must be a minimum of 6 inches above the floor.

The Washing machine standpipe must be a minimum of 18" and a maximum of 42" above the trap inlet (International Residential Code) (Max 30" above the trap opening under the Uniform Plumbing Code.)

The horizontal waste arms must be connected to the vertical riser by means of a Sanitary Tee. (Wye & 1/8th bend or combo prohibited).

Under the Uniform Plumbing Code, if the laundry sink and Washing machine standpipe drain into a common riser they must be conncted to the riser by means of a back-to-back fitting (Sanitary Cross)

There may be no female threaded PVC fittings excepting a female cleanout adapter with a threaded male plug.

Both Cleaner and glue must be used to make the PVC joints.

All PVC fittings and pipe must be listed DWV grade (DWV= Drain,Waste & Vent), and all pipe must be run in a manner that the writing on the pipe wall is clearly visible for inspection.

There may be no metal straps, hangers or supports in direct contact with PVC pipe. (Use PVC J-hooks, PVC strap hangers or PVC perforated strapping.)

If you are planning to hire a plumber, you should contact him before any work commences to determine if he will need to rough in the underslab portion before pouring concrete, or to schedule the stack out portion during the framing phase.