viola
New Member
Posts: 6 
Likes: 2
Currently Offline
|
Post by viola on Jul 5, 2015 13:21:33 GMT -8
I have been trying to install a new water tank every weekend for about a month so now I'm coming to you for help. The new tank is the same size dimensions and number of holes as the old one- thank you Amazon. I have everything connected the tank is full of water, no leaking, but the hand pump isn't pulling the water through the tube. I noticed that the vent has water in it (not sure how that happened). Do I just need to pump for longer? I apologize if I use too many pictures, I just want to be sure I am not missing the obvious, any advice please help!  Sink with faucet and hand pump  Where hand pump connects to tubing (I bought hard tubing exactly like the original because the normal plumbing tubing I originally had just sucked itself in when I pumped)  This is the tubing from the sink connecting to the male to male connector thing (yup I'm really picking up the terminology here) because the tubing on the tank and the hand pump didn't match.  tubing from sink into tank  You can see the main fill tubing (no problems there) as well as the vent tube- this has water in it for some reason, it is also sucked in- sorry it's a tight space so hard to take good pics.  this is a picture of the emptying tube- it's got some problems because it is kinked and I'm including because I'm not sure if that could be causing the problems but I doubt it. Thank you! |
|
|
|
Post by vikx on Jul 5, 2015 21:52:25 GMT -8
Hi Viola,
I will try to help:
1. The hand pump may need to be rebuilt. Sometimes, they try to pump but just can't make the draw... to test, stick the pump supply tube in a large bottle of water, keep it a fairly short run.(a heat gun will help connect and disconnect the tubing)
2. The hand pump may need to be primed. Usually involves filling the supply tube with water and then pumping madly to get the water flowing... Sometimes, the pump gaskets just need to be wet to work.
3. The vent tube might have water in it if the tank was overfilled. Not a biggie, just a possible reason. If it still has open air as a vent, should be OK. If it is sucked flat, a big problem. To pump "from" the tank, you need air to go "into" the tank so as not to create a vacuum.
4. The tank drain needs an elbow straight down thru the floor to eliminate the kinks. Not an issue for the hand pump.
What is the upper line that appears to be collapsed? (next to last photo)
Let us know what you find and we'll go from there.
|
|
|
|
Post by bigbill on Jul 6, 2015 5:46:23 GMT -8
Make certain that the hole in the tank where your suction line is attached is drilled through into the tank. some tanks are sold with threaded flanges but they are not drilled through in case you don't use them in your application. If this is found to be the problem you just drill a hole through being careful not to damage the threads.
|
|
viola
New Member
Posts: 6
Likes: 2
Currently Offline
|
Post by viola on Jul 6, 2015 18:55:50 GMT -8
Thank you so much for the help, I have really hit a frustrating wall so your advice helps more than you know. I did the direct water test (put a full cup of water directly under the intake) and nothing happened so vikx looks like you were right that it's the hand pump that is the problem. I think the vent water is from condensation after I gave it some thought. Thank you bigbill for the vent advice I am going to double check that it is not closed. So I'm guessing I should be in the market for a new hand pump? Or do you know of a way to fix a broken hand pump? The last picture of the collapsed tube is the exit/release hose to the outside. I used the spray foam to seal off the large hole in the bottom and it collapsed the hose- so I've got a full tank lol!
|
|
|
|
Post by vikx on Jul 6, 2015 21:08:18 GMT -8
New hand pumps are available. Look up "Rocket Hand Pump, RV".
Since you have to remove the pump anyway, try it again just to be sure. As said, sometimes the innards just need to be "wet".
You also have the option of a 12 volt pump if you plan on a 12 volt system. They are on demand, so you open the faucet and water flows...
I had to laugh at Big Bill's suggestion. Wonder how I know that can happen?? Yup, been there...
|
|
|
|
Post by bigbill on Jul 7, 2015 0:13:24 GMT -8
If I understood right your plastic hose collapsed when you operated the pump, if so your pump is working and you have a restricted line. Make sure ALL tank openings that you are using are open and that your line isn't pinched or kinked. You should be able to suck water through the line like a big straw or you can pressurize the tank through the vent and blow water out the supply hose, if you also seal off the fill opening. Four or five pound of air should be plenty to make water flow.
|
|
