Q:"Please tell me how many inches it is from the valve connector to the inside 90 of the device. Please send diagram with measurements if possible. Our valves are located in the back of the box and I have concerns if the valves will protrude past the front cover, plus I want to install water arrestors. Thanks, Jim."
Answer: We checked with the manufacturer's rep as this was beyond our expertise. Bob's response: "I have no diagram available for him, but understand his question.
The distance from the inlet end of the valve where the spinning female threaded collar is to the inside edge of the 90 degree downward outlet end of the valve is 2 9/16 inches (slightly over 2.5 inches). The FloodStop 3/4-H90 was specifically designed for wall box type installations. Numerous wall boxes were evaluated to determine the valve design so it would fit all brands. I cannot remember when someone returned a FloodStop 3/4-H90 because the outlet end of the FS valves did not protrude past the front cover of the wall box. Typically installing water arrestors increases the extension of the FS valves out from the hot and cold water hose-bibs."
FYI: The FloodStop is a dual valved water damage control device that turns off water to a washer machine when the water sensor (placed usually under the machine) senses moisture. The newest model utilizes AC power with a battery backup and has twin ball valves that shut off the water.
For those who have a different system, we do have the straight line version.
Thanks for your question.