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Old 06-23-2006, 06:41 PM   #1
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1964 22' Safari
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Do Tanks Breathe

PO removed the fresh water tanks and I am left with a exterior fill hole and a cut copper line at the floor. My questions..... once the tank is installed and the system is sealed, what allows it to breathe once the water is pumped thru the lines and the tanks start to empty? Do water tanks have vents that will let air in and wont let any water out?

Thanks
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Old 06-23-2006, 06:48 PM   #2
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I believe there is a breather hole near the filling area for the freshwater tank.
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Old 06-23-2006, 06:58 PM   #3
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Quote:
Originally Posted by achip
PO removed the fresh water tanks and I am left with a exterior fill hole and a cut copper line at the floor. My questions..... once the tank is installed and the system is sealed, what allows it to breathe once the water is pumped thru the lines and the tanks start to empty? Do water tanks have vents that will let air in and wont let any water out?

Thanks
Pressurized water systems do not breathe.

Demand systems must breathe or the plastic tank will collapse.

Andy
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Old 06-23-2006, 07:08 PM   #4
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Your profile does not indicate what model or year you own. My 63 originally had a cylindrical metal tank under the bed and was an air pressurized system. Obviously it could not breath or it would not work. I converted it to a water pump system and put in a vent. My 77 was a water pump system and air entered thru the the vent next to the filler nozzle area to allow the water to be pumped out. When you fill the tanks you can hear the air rushing out of the vent.
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Old 06-23-2006, 07:27 PM   #5
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Andy -

How does the system in my '64 breathe? What you said makes complete sense, but I haven't seen anything that appears to be a vent - as a matter of fact, if I fill it to rapidly, it "burps" the water right back out the filler neck when the water displaces the air in the tank.
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Old 06-23-2006, 07:45 PM   #6
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Andy -

How does the system in my '64 breathe? What you said makes complete sense, but I haven't seen anything that appears to be a vent - as a matter of fact, if I fill it to rapidly, it "burps" the water right back out the filler neck when the water displaces the air in the tank.
Your filling the water tank way too fast.

You will rupture the tank the way you described that you fill it.

Take your time.

Your system, if I remember correctly, since you have a plastic tank, vents through the filler cap.

Andy
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Old 06-23-2006, 07:51 PM   #7
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Your filling the water tank way too fast.

You will rupture the tank the way you described that you fill it.

Take your time.

Your system, if I remember correctly, since you have a plastic tank, vents through the filler cap.

Andy
Thanks - I learned to fill slower the first time I tried to fill it - I was standing directly in front of the fill spout and got quite wet It only took once to figure out to turn the water down and fill slower

I'll have to take a closer look at the filler cap.
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Old 06-23-2006, 08:04 PM   #8
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Have no profile yet (1964 safari 22') Don't see a place in the fill area for a vent. Do they make a cap that breathes?

Thanks for the help
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Old 06-23-2006, 08:07 PM   #9
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ANDY

What does your filler cap look like? My cap is a black ABS 2"
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Old 06-23-2006, 08:11 PM   #10
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My filler cap is solid, no vent holes. It is solid metal, says "vise grip" on it.
However I just took a closer look at my tank and mine has a copper line coming out the top and routing out the floor, so I'm assuming thats how mine vents.
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Old 06-23-2006, 08:23 PM   #11
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That makes perfect sense..NOW I have a plan.

Thank You
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Old 06-24-2006, 06:07 AM   #12
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If the 64 originally had a air pressurized system rather than a water pump (as my 63 did), the copper vent line had a hand tightenable plug in the end of it up by the filler cap area on the outside of the trailer. You removed the plug when you filled the tank and then put both the plug and the filler cap back on and pressurized the tank with air (if you were at a fill station with access to compressed air) or waited till you got to the campground and let the on board compressor pressurize the tank.
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Old 06-24-2006, 08:25 AM   #13
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If the 64 originally had a air pressurized system rather than a water pump (as my 63 did), the copper vent line had a hand tightenable plug in the end of it up by the filler cap area on the outside of the trailer. You removed the plug when you filled the tank and then put both the plug and the filler cap back on and pressurized the tank with air (if you were at a fill station with access to compressed air) or waited till you got to the campground and let the on board compressor pressurize the tank.
I think by '64 they had switched over to the on-demand system with the PAR pump. (at least that's what was in mine - I've learned that sometimes there were no hard fast rules back then)
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Old 06-24-2006, 11:00 AM   #14
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ANDY

What does your filler cap look like? My cap is a black ABS 2"

What year trailer do you have?

Andy
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