check valve on dishwasher drain line

[JesseWBryant]

Todays dishwasher did not have a sufficient "high loop" and did not have an anti-siphon device at the sink deck. However, a check valve was added to the drain line with the directional marker clearly pointing towards the disposer where it terminated.

Good enough? Just curious.

[hausdok]

I'd accept it. Heck, I see so many with neither a high loop or an air gap that I sometimes wonder why half the folks on Puget Sound aren't standing in line outside of restrooms suffering from the runs. Anything is better than nothing.

OT - OF!!!

M.

[chicago]

Never thought of it being done that way.

I wonder why that is not done more.?

[Richard Moore]

Some, maybe all, Miele dishwashers have...

"A built-in mechanical non-return valve on the discharge side to prevent waste water from flowing back into the dishwasher."

Anyone know if any other brands have a built-in check valve?

[Jesse]

Does the Miele installation guide tell you to use a high loop? Or, because of the valve, do they ignore it?

[Scottpat]

Many of the new units have their drain line being routed up and over the top of the unit. Granted we can't see this, so we need to look for one at the sink. Also the high end units have them built in, but again we can't see this. But on new homes I always try to look in the install manual to see if the unit has one.

[chicago]

That is a very good tip that's easy to overlook.

[Focal Point]

Does anyone have a link to the "proper" way to install a dishwasher? pictures would be good.

[chicago]

I spent six years installing them five days a week for Sears.It was our most common install,and they would give me $35.00@ plus 25% of extra pay on what I bid at the customers home for anything needed such as cutting or rebuilding cabinets and running electric,waterlines,shutoffs,etc;

Just check that they used both screws in the brackets,that it is centered so the door does not rub against anything.Make sure it has a shutoff under the sink,and check that the drain line has a trap going to above the level of the sink basin bottom.They never made us use aerators if they were not there already.

Nothing that complicated.

[Bill Kibbel]

Originally posted by Focal Point

Does anyone have a link to the "proper" way to install a dishwasher? pictures would be good.

When applicable, I put this in reports:

[Richard Moore]

And to answer Jesse's question from before...here's the page from the Miele install manual.

Download Attachment: mieleinstall.jpg

109.96 KB

No high-loop or air-gap required. At least by the manufacturer.