Hi folks,
I have recently refilled my fresh water tank, having purged it for my first winter. I now notice there is a venting problem. Maybe it was always there and I never noticed before. When I run water, it pulls a vacuum in the tank. It is then a struggle to open the water refill cap followed by a big inrush of air. So I investigated.
Here is my setup, a large water intake pipe with a smaller red venting tube.
I expected to see a hole from the front side of the inlet that matched up with the venting tube but it is obviously designed differently and must vent through the cap.
I removed the venting tube momentarily. I attached a small piece of tube and tried to blow through it, the idea being to see if it was blocked.
With the cap removed, I could blow some air though the pipe but there is some resistance. With the cap in place, there was even more resistance. I am of coarse blowing air in the reverse direction to normal operation so perhaps air should not flow so freely in that direction.
With everything reattached, I tightened up the cap and ran some water again but the issue remains. I suppose that by removing the cap, air does rush in so the venting tube must be ok. This really leaves the cap doesn't it? Is there anything I can do to fix this?
This is what my inlet looks like. Maybe someone recognises the part or manufacturer, just in case I need to buy a new cap. Or are these caps standardised?
Any help appreciated.
I have recently refilled my fresh water tank, having purged it for my first winter. I now notice there is a venting problem. Maybe it was always there and I never noticed before. When I run water, it pulls a vacuum in the tank. It is then a struggle to open the water refill cap followed by a big inrush of air. So I investigated.
Here is my setup, a large water intake pipe with a smaller red venting tube.
I expected to see a hole from the front side of the inlet that matched up with the venting tube but it is obviously designed differently and must vent through the cap.
I removed the venting tube momentarily. I attached a small piece of tube and tried to blow through it, the idea being to see if it was blocked.
With the cap removed, I could blow some air though the pipe but there is some resistance. With the cap in place, there was even more resistance. I am of coarse blowing air in the reverse direction to normal operation so perhaps air should not flow so freely in that direction.
With everything reattached, I tightened up the cap and ran some water again but the issue remains. I suppose that by removing the cap, air does rush in so the venting tube must be ok. This really leaves the cap doesn't it? Is there anything I can do to fix this?
This is what my inlet looks like. Maybe someone recognises the part or manufacturer, just in case I need to buy a new cap. Or are these caps standardised?
Any help appreciated.