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Topic: Checking the wet tank drain valve (Read 330 times) previous topic - next topic

Checking the wet tank drain valve

Question about opening the drain valve to the wet tank to check for water/oil... I open the valve and high pressure air hisses out. I leave it open for 5 seconds or so, get nothing but air. Am I doing this right? Am I supposed to drain all the air out and see what comes out at the end? I know with my portable air compressors water comes out only at the end.
1998 U295 36' No slides
Towing 2018 Jeep Wrangler
Previous rigs:
  1995 26' Fleetwood Flair
  1998 34' Fleetwood Bounder
  1997 40' Bluebird BMC
  1999 24' Winnebago Minnie Class C

Re: Checking the wet tank drain valve

Reply #1 –
Absolutely correct. If your air dryer is working properly, you should never get water.
1994 U280, Build 4490
Deming, NM.

Re: Checking the wet tank drain valve

Reply #2 –
Quote from: Dan & Annie –
I open the valve and high pressure air hisses out. I leave it open for 5 seconds or so, get nothing but air. Am I doing this right?
Yes, you are doing it right.  If you follow the air line from the drain valve back to the air tank, you will see that the line comes off the bottom of the tank.  If there is any moisture in the tank, it will settle to the bottom and fill up the air line going to the drain valve.  If you get dry air when you first open the valve, your dryer is in good shape.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"