Pre-Pressurized Accumulator Tank

Bobbo wrote:
Do yourself a favor and get a 2 gallon accumulator tank. It will do everything the Shurflo tank will do, and will let you flush the toilet all night without the pump turning on once. It's cheaper too.

Nice job and good feedback on the larger, non-RV accumulator tank. Maybe next time I will use this tank.

I put in a 1 quart accumilator tank when I first bought my RV and was very happpy with how quiet the pump was afterwords.

Fred.

Do yourself a favor and get a 2 gallon accumulator tank. It will do everything the Shurflo tank will do, and will let you flush the toilet all night without the pump turning on once. It's cheaper too.

Here is a picture of my 2 gallon tank installed under my kitchen sink. Note the bypass that I added so I can keep antifreeze out of the tank. It diverts the flow to a tube that I can then open to let the antifreeze fill the line going to the tank.

4aSong wrote:
My TT has a 4008 RV By-Pass Pump By SHURflo and the Installation and Maintenance manual says that there is no need for an accumulator with by-pass pumps. Will an accumulator help or hinder when used with this pump?

Note that "not necessary" is not the same as incompatible. The bypass pump doesn't do that pulsation thing the older pumps do, but the accumulator tank adds the ability to flush the toilet all night without the pump turning on. A bypass pump can't do that. For me, that was the more important of the issues.

My TT has a 4008 RV By-Pass Pump By SHURflo and the Installation and Maintenance manual says that there is no need for an accumulator with by-pass pumps. Will an accumulator help or hinder when used with this pump?

hedge wrote:

ah64id wrote:

The bladder pushes everything out of the tank when empty, so the only place something sites is in the fitting and a few flushes is all it takes.

Honestly thou, you don't need to be putting pink fluid into the system. Blow the lines out and then use just enough anti-freeze to fill the pump, couple cups is all it takes.

ok, thanks.

I don't want to get into that debate. but I personally don't trust just air. It still has the possibility of collecting in low spots. I've known people it's happened to. It gets very cold here so I'm not taking the chance.

You should be fine, when you buy the tank look just inside the fitting and you will see the bladder sitting there.

When you do your spring flush don't let pressure build before flushing. Open all the faucets and then turn on the pump. This will keep the pressure from pushing any antifreeze into the tank.

Yes it does get cold there, we get below zero F for a bit every year and air always works if done properly. Do you ever get down to -50°F? Getting that cold it's worse to have RV antifreeze than blown out

ah64id wrote:

The bladder pushes everything out of the tank when empty, so the only place something sites is in the fitting and a few flushes is all it takes.

Honestly thou, you don't need to be putting pink fluid into the system. Blow the lines out and then use just enough anti-freeze to fill the pump, couple cups is all it takes.

ok, thanks.

I don't want to get into that debate. but I personally don't trust just air. It still has the possibility of collecting in low spots. I've known people it's happened to. It gets very cold here so I'm not taking the chance.

hedge wrote:
I'm considering adding one too. How does it affect the winterizing procedure? It seems to me that if you run anti-freeze into it that it may be hard to get out again. It appears from the pics that it isn't a passthrough design but shares the in/out so it seems to me that when you went to d-winterize the water may not push out all of the anti-freeze.

The bladder pushes everything out of the tank when empty, so the only place something sites is in the fitting and a few flushes is all it takes.

Honestly thou, you don't need to be putting pink fluid into the system. Blow the lines out and then use just enough anti-freeze to fill the pump, couple cups is all it takes.

I'm considering adding one too. How does it affect the winterizing procedure? It seems to me that if you run anti-freeze into it that it may be hard to get out again. It appears from the pics that it isn't a passthrough design but shares the in/out so it seems to me that when you went to d-winterize the water may not push out all of the anti-freeze.

Aside from reducing the noise, I think that the accumulator reduces the total amount of electricity used by the pump (and thus reduces the draw on your battery when you are not plugged in). The total running time for the pump is much less than before I installed the accumulator -- instead of running continuously when the water is on, the pump runs in much shorter bursts.

We have a pressure tank and it's up there on the list of best mods. We get more than enough water for a nights worth of use, such as drinks, brushing teeth, and a couple quick flushes. This means no pump noise with sleeping kids.

It's also great for a constant light flow for dishes and other stuff.