LP ?

[7outof10]

last year i ridged up my house with lp lights 2 of them and i have a lp heater and it all worked pretty good and i used pretty big copper line.

the problem that i have is that ever thing works really good untell there is about 1/4 left in the cylinder then the heater will not work i am using a 20 pounder and the lights will work but the heater will not but i can change the tank and it will work just fine .....i was thinking that mabe i have the presser that i need out of the 20 pounder maby ?

[7outof10]

is there any thing i can do to make it burn the hole tank up i like useing a 20 pounder ....but maby i need to get a 100 pounder

[arcticcat400]

im not sure on this but i think some heaters require a larger tank because with a smaller one they do not get enough pressure

[MuleShack]

you might want to try a 30#, that might be enough.

I guess it depends on the type of heater you have too.

I have a forced air, and that thing burns till the tank is MT with a 30#.

Also not sure on the ramifications of having larger copper piping instead of 1/4" if that will change the pressure?

[bassislife]

Chances are it could be your regulator. Make sure it is a good 2-stage regulator and not one of those cheap BBQ type (single stage).

[BobT]

I'm not sure that a larger tank has any higher initial pressure than a lower volume tank. I think that as you consume the fuel, the inside pressure will gradually drop because there's less fuel to evaporate. Evenutually, no matter the size of the tank, your fuel pressure will drop below the level required by the heater and it's safety system will shut it down. Lower pressure can result in poorer combustion and some heaters perhaps are set up to shut down earlier than others to prevent this danger.

Bob

[dkf]

Is your cylinder cold when theres a 1/4 tank left? The colder the liquid is the slower it will turn to gas. Might not be turning to gas fast enough to keep everything going.

[MuleShack]

I think it also depends on the outside temps. The colder outside the slower it evaporates. could try to wrap the tank with a blanket?