We use propane for the kitchen stove (75k BTU/HR) and gas fireplace logs (39k BTU/HR). I want to move my 100lb. propane tank from the side of our house, to behind the garden shed in back of the house. I dug a trench to bury the gas line and the distance will be 135ft to the house. After some research, I "think" I want to use gasflex for the trunk line to the house, due to it's noncorrosive properties and it can be buried with direct ground contact. [B]What I'm not sure of is what size line to run?[/B] Eventually, I would like to add a second 100lb. tank and have a multiple cylinder manifold, with a automatic 1st stage changeover regulator, so I can fill one tank while running off the second. Any thoughts and opinions would be greatly appreciated!

I've been having a weird water usage spike at night. I've narrowed it down to a mystery usage of water in the middle of the night, ranging anywhere from 60-100 gallons. The house has 3 bathrooms and it's just me and my wife in the house. Whatever it is, it is not a constant leak because I never see the flow indicator moving when I make my readings. Due to various tests I've run, I've ruled out the irrigation (landscaper said it was working fine), water softener, the toilets, and really anything inside the house. I'm definitely a plumbing novice, so I have no problem calling a plumber, but I just want to make sure it's not something obvious first. I'm tired of doing constant meter readings, so I'm hoping you guys have a suggestion. If interested, I've included some more facts below. Thanks for your help. Relevant facts: -Usually this spike seems to be happening around 1-2am. I say this because sometimes I go out and make a reading before I go to bed around 1:30am, and sometimes the spike has already occurred. On these nights, I'll still make a reading in the morning and I see no excess usage. -Water company said it might be ghost flushing, so I've shut off water to the upstairs toilets over night, and the spike has still occurred. Plus, I don't see how it could be a toilet if the water is being used early in the night then stops on its own? -I went away for two weeks in September, at which point I shut off one of the shut off valves in the garage. After returning and making readings, and accounting for the water my irrigation used, I was still using about 75 gallons a day of water. (full disclosure: for some reason, I have 3 shut off valves in the garage and another one connected to the water heater - I was told that any of the 3 would shut off water to the house?) -After examining the shut off valves, I noticed that the one I shut off may not have shut off the water softener. The water softener is set for 2am, and we have not heard it go off every night, so I always doubted it was the cause. To be sure, I turned the by pass valve on one night and a spike still occurred. The spike was on the low side (about 60 gallons). -Only things I can think of that use water in this house are toilets, showers, sinks, ice maker, reverse osmosis system, water softener, water heater, dishwasher, washing machine, and irrigation. Assuming the shut off valve I used was working properly, then it shouldn't be anything inside the house. -The water company came out and tested the meter, and they say it's working properly. -This may not be relevant, but for the last couple of months, I get a faint sulfur/rotten egg smell from the master bedroom sink. It's not constant and only seems to be there when the sink hasn't run for a while. I also heard some squeaking pipes in the master as well, and again, only when the faucet hasn't been used in a while. -I'm desperate, so my next move is to turn off all 4 shutoff valves in the garage over night, just to make sure my previous tests were accurate. After that, I'm going to turn the water off at the main, just to be sure it really isn't the meter.