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Is it a large one like this?http://www.amazon.com/gp/aw/d/B0012RPD3E/ref=s9_zwish_hm_awbw_bFkmz_g60_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=mobile-hybrid-13&pf_rd_r=0BJY5J3ZGDSR1W2VGAW5&pf_rd_t=30901&pf_rd_p=49e880c9-bad8-55af-ab9d-8f7392741ba8&pf_rd_i=3754781
If the sink is hard piped into the drainage system, then there isn't much else you can do. The problem with the low water usage washers out there, they have faster pumps which cause the same issue.
I can describe what to do much easier and faster over the phone if you like. There is an additional charge for that though.
We usually hang the washer hose into a large laundry tub. From there we put a trap on the laundry tub and hard pipe it into the drainage system
Does this make sense to you?
The tub that I posted can hold more water than the washer, however if it's clogged then it will not keep up with the next cycle. Your only other option is to replace it all the way to the main in 2"
One other option is to have tub drain into a pump and then if it's feasible have it pump to the larger mainline. Since I'm not there I cannot say if that's feasible. Most pumps will allow you to use just a 1" PVC line for liquid waste.
Do you have a crawl space at all or is it all concrete slab?
The tub I posted holds 22 gallons that's a lot.
If you have more questions please let me know, I'm here to help.
With the proper pump absolutely. Give me a few and I'll post a link.
Yes, that is correct!! It's a matter of pumping it up then letting gravity do its thing. Here's what I'd use. Run 1-1/2" PVC. And this pump.
This is WAY cheaper than a pump that uses 1". The head pressure is key. I love these Liberty pumps.
Fits right under the laundry tub.
If you are satisfied with my answer to your original question Please leave me a positive rating and tips are always greatly appreciated
I'm pretty sure I gave more than enough information to warrant a positive rating
So how'd it work out for you?