Just a thought but, your electrical access problem could be solved by simply hard wiring the pumps and putting a switch or timer inside the shop. That way, no access door would be needed. A simple inexpensive timer can be set up to light the pumps at a certain time and shut off at another? I've done a few of these and the timer works great. Another option is to use an electric eye at the pump but the pumps would remain on all night. Paul
www.severngaspumps.com i've kicked myself numerous times for not adding a box/switch for this inside when i wired the shop. the inside walls are the same type metal thats on the outside & to do it now, i would have to remove about 20ft of cabinets, countertop, sewing machine & possibly drop the t.v. just to get the walls bare to remove the metal to do something. i have seriously considered looping a timer into the system, but still want a main switch for times i dont want it on.
