Reply #7: OK than !

[Wash. state Desk Jet]

Given the additional information I would venture to say raising the drain line may solve the issue. Now since you mentioned experience ,when installing those stacking washer and dryers and in some cases plumbing in for those,the stacker's drain directly into the drain line. In fact there is a box that you buy extra that has the drain hook up and the hot and cold water valves. Now, in a second story install of course if yer plumbing runs straight down ,the length of now 2 inch drain lines by code isn't a problem. That last stacker I installed was a straight shot form the basement drain up to the enclosed porch where the stacker's were installed. The run of drain line straight up in the old 1 1/2 inch drain lines was just enough . In other words it drains just fine. The old plumbing accommodated the change.

In short what I am getting at is this, can you add to your drain line, can you raise it up? That may compensate for the volume of water pumped out by your new washer. As those pumps wear ,those pumps also decease in pressure meaning the rate in speed and volume flow slows down. Yer new washer pump is more powerful.Also the product Drain Care,Draino makes it's equivalent- what the stuff does is it breaks down those hard deposit build up's in your drain lines. Now, your home was built in the fifties and if it has not been re plumed ,and my guess is it has not,than you do have hard deposit build up in those drain lines. So Drain Care is a good thing to use on those pipes. Home Depot and Lowe's has that Drain Care and Draino's equivalent to it. It is a green color liquid ,Drain Care makes the stuff in you mix it form or powder,- good for about 40 treatments.

Be interested to know what the out come is after they look it over this week end.

Good Luck.