DIY Pressure Testing for Rain Leaks
I have an impossible to find leak in my travel trailer and I am at my wits end. My trailer is a 40 ft. Park model on a permanent campsite in southern Delaware with a hard room and deck attached so I d...
Forum Discussion
Please look at the SealTech operating procedure I quoted in my previous post above. In Step 2 they adjust the RPM of the blower to set the pressure, not the air flow rate. They aren't looking for a high flow rate, just the desired pressure range.
I'm pretty sure that the Sealtech blower acts like most vaned blowers. The flow rate and pressure increase or decrease with RPM of the blower. It is almost linear with RPM. What makes it not so critical is that the interior space is sealed somewhat and much like a balloon, takes a certain amount of air to inflate. The time it takes to do that and the final pressure attained will hinge on the delivery rate of the blower. The interior is a large space and needs a fairly good amount of air blown into it to raise the pressure 1" WC or a fraction of a PSI.
My trailer is sealed better than most, I have a full vapor barrier under the paneling. When running the test there is a lot of air escaping through the door and other places.
