Checking for D.C. Air leaks.

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Forum topic by leftcoaster posted 03-16-2017 05:44 PM 389 views 0 times favorited 4 replies Add to Favorites Watch
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229 posts in 1020 days

03-16-2017 05:44 PM

I have a new laguna c|flux 1.5 for one machine at a time. I’ve plumber ABS 4” pipe on the ceiling with blast gates. The D.C. Is connected with a 10’ flex hose so I can pull it out for maintenance. It’s a lot of hose for normal use and drops straight off the D.C. Before doing a 170 degree turn back up to the ceiling.

The abs goes immediately into a wye. All other turns are long 45s.longest distance to a blast gate is 25 feet. Shortest is 10 feet.

CFM feels weak though I am getting most of it.

Are there easy tests for leaks at the friction fit points? I have not used tape or caulk.

Is that flex hose bend at the start a giant problem? Should I shorten the hose and add a quick disconnect for maintenance? Other suggestions? I’d rather not jump to the 6” pipe everywhere right away please.

4 replies so far

View Redoak49's profile


3523 posts in 2132 days

#1 posted 03-16-2017 05:52 PM

IMHO…...the long flex hose and sharp turn are not good for performance. Making a gentle curve and the least flex hose should be a goal.

View TungOil's profile


1031 posts in 639 days

#2 posted 03-16-2017 05:54 PM

I suggest minimizing the amount of flex you have as a start.

-- The optimist says "the glass is half full". The pessimist says "the glass is half empty". The engineer says "the glass is twice as big as it needs to be"

View ClayandNancy's profile


520 posts in 3159 days

#3 posted 03-16-2017 06:16 PM

Rule of thumb should be a straight 5-6 feet from collector to first bend.

View Fred Hargis's profile

Fred Hargis

5089 posts in 2637 days

#4 posted 03-16-2017 07:46 PM

I suspect your duct work is the biggest drawback, but I check for leaks with a smoke stick (a cigar, in my case) and watch carefully. I suppose you could use a feather or something else as well. Just hold whatever it is next to the seams and watch the flow of air. The cigar isn’t the best probably, but i had one on hand. Did take a while to air the shop out.

-- Our village hasn't lost it's idiot, he was elected to congress.

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