The drain pipe should be a minimum of 1-1/2" I.D. (inside diameter) to ensure proper draining. The Washer drain hose is a 1-1/4" O.D. (outside diameter). To be confident that no siphoning of water will take place, the drain plumbing must be a minimum of 30" high for Top Load Washers.
The drain hose should be connected to the standpipe at the correct height for it to work properly. Ensure the highest point of the water drain hose is a minimum of 40cm and a maximum height of 100cm from the floor.
Water can siphon out of the machine if the end of the drain hose is too low. The machine won't necessarily be physically damaged ... but it can malfunction or generate a fault code if it's washing along and the water siphons out. It may not be able to fill if water is running in and siphoning out at the same time.
The hose should end a bit over 30 inches above the washer bottom, otherwise there is potential for siphoning water from the machine, which may lead to water draining out of the washer at during full water phases of the wash. The higher it goes past that, the more the pump has to work.
In order for the drain hose on your Top Load Washer to function properly, the drain must be at least 30" up from the floor and less than 8 feet high. In order for the drain hose on your Front Load Washer to function properly, the drain must be at least 24" up from the floor and less than 8 feet high.
Your laundry standpipe must extend past your washer's overflow line, typically reaching a height of 30-36” or 18”-30” above the trap.
Unfortunately, any issue with the drainage process can cause an overflow of the drain, resulting in water leaking out all over your floor and a handful of other potentially expensive problems, like a ruined floor, mold growth, and damaged sheetrock and insulation.
Your legal obligation is to ensure that any waste pipe you attach to the drain hose includes a P trap with a U bend between your sink or appliance and the mains drain. This is to prevent foul smells from coming from the drain into your home.
406.2Waste connection. The waste from an automatic clothes washer shall discharge through an air break into a standpipe in accordance with Section 802.4. 3 or into a laundry sink. The trap and fixture drain for an automatic clothes washer standpipe shall be not less than 2 inches (51 mm) in diameter.
The discharge height MUST NOT BE LESS THAN 30 INCHES and no more than 8 feet above the base of a Top Load washer.
The pump filter in your washing machine can become clogged with lint, hair, and other debris, preventing it from draining properly. To clean the pump filter: a. Consult your washing machine's user manual to locate the filter (usually at the front or bottom of the machine).
When fitting a standpipe for a washing machine the pipe must be higher than the washing machine drum to prevent syphoning. The hole which goes through the wall should be sloping downwards towards the outside of the property, so water drains away from the appliance.
Laundry rooms must have at least one 20-amp circuit for receptacles serving washing machines or gas dryers. The lighting circuit must not be connected to the 20-amp laundry circuit. Electric dryers require their own 30-amp, 240-volt circuit with four conductors. All laundry room receptacles must have GFCI protection.
450mm up from the floor level.
Electrical sockets, switches and other electrical control devices should be a minimum of 350mm from corners of a room.
Washing machines overflow for a variety of reasons—the leading culprit, though, is a clog in the drain pipe. Lint and other debris come off of clothing during the wash cycle and are drained from the unit alongside the dirty water, potentially leading to clogs that can wreak havoc on your drain pipe.
If your washing machine's drain hose is not securely attached to the standpipe or is kinked it can cause water to leak and overflow.
The standard washing machine drain size is 2 inches, and the minimum requirement is 1 1/2 inches. Modern washers typically require a larger drain, and you may need a larger drain if it's connected to your kitchen sink.
804.1 Standpipe Receptors.
No standpipe receptor for a clothes washer shall extend more than 30 inches (762 mm), or not less than 18 inches (457 mm) above its trap.
Drain height is the distance between a sink drain and the wastewater drainpipe. The optimal drain height is between 16 and 24 inches. The wrong drain height can cause drainage problems, clogs, and P-trap smells. Appliances like dishwashers and garbage disposals need the right drain height.
This is typically 42 in. from the floor to the top of the outlet box. If you're replacing an existing outlet box, shut off the water supply and drain the water lines.