Howdy, Howdy. Have a plumbing question. Just bought a 91 32ft Holiday Rambler Alum-Lite XL, she is almost brand new condition, and we are the 4th owners. Learned we needed a water pressure regulator after being hooked up to house water pressure for about 8 hours while I tried to fix a leak at the water heater. Got that fixed but now there is water running out of a drain pipe under the trailer by the water heater. There are 3 short pipes, grey, about 3 inches long, hanging out of the trailer and water runs out of one, even after putting a regulator (40 lbs) on the inlet. Is this normal, or did a pressure relief valve open. More than a drip, but not a gusher. Former owner said it did that with them too. Been looking through all the literature they kept but have not found anything yet. Maybe the brain pool here can help. Thanks in advance.