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For this one, am I limited to hack saw? Or there some kind of close quarters tool I can use for 4 inch ABS?

Hi all, From what I understand, each horizontal section of ventilation pipe needs to be positive slopped at 1/4" per foot, is that correct? Such as this: Also, Is there a particular slope that is required for vertical sections of vent pipe?

The bedroom is on the other side of the basement where there no ventilation, far away from the dyer, hvac, and hot water heater. Would it useful to put the CO detector so far away? Like I said, my basement is pretty big.

Thanks for the info guys, I will have to look into getting this. Another question about the static wall mount CO detectors. I'm looking to also get one of those in my basement where my dryer/HVAC/water heater is with all of the ventilation there, will a single wall mount unit detect CO in the...

It is very easy to tell if there is a water leak, especially if your system is under pressure (such as your water main), but is isn't clear how to test for leaks after doing ventilation work. I just redid some ventilation work for my dryer (gas), but don't know to test if there are any leaks...

Understood, I have to admit I know next to little about plumbing but am learning. Just to be clear though, a RPZ device will prevent both backflow and siphonage right? Meaning between the water main and the irrigation, this is the only device I need?

Do you have a link that has the lead free version?

So after all of the discussion, for an irrigation system, the anti-siphon/backflow preventor that is recommended is an RPZ device, such as the one in the OP (Wilkins 3/4" 975XL)? EDIT: Actually, why do all sellers of this device say they can't ship to CA? Is this device actually NOT...

So pumps anywhere on the residence after the service main will cause backflow, understood. Make sense why backflow preventers are needed for commercial properties with fire hydrants than. So if the only thing harmful on the service main is an irrigation system, then only an anti-siphonage...

Why (for residential use) do you need to protect from anti-siphon but not back pressure? Do check valves protect from both? Most residential sprinkler valves are anti-siphon valves but say nothing about protecting from back pressure. Do the industrial check valves (the big double check valves)...

What is the difference between back siphonage and back pressure?

Thanks. Is it okay to run it bare or does it need some kind of insulation?

Got it, I'll be using type L copper then, Thanks.

Given it is, does this also need to be elevated above ground? and if so, by how much?

Is a RPZ and double check the same except the pressure reduction? It looks the same: http://www.amazon.com/dp/B0006B07A6/?tag=skimlinks_replacement-20 I'm 100% sure the double check and RPZ devices are approved where I live because I literally see them everywhere on commercial properties...

Do you think you can help me out here? http://www.cityofsacramento.org/utilities/pubs/stdspecs/Water.pdf I can't find the information I'm looking for. As to what pipe is allowed underground for residential use. If copper type L is allowed, that is easy to get at home depot. But copper type...

I know copper can't be used underground and I'm trying to avoid using galvanized steel, what are my rigid water pipe options to use underground?

I'm going to redo my irrigation system and instead of using the above ground anti-spihon valves I want to install a dual check valves and then inline timer valves. The DC valve im thinking of getting is this one: http://www.amazon.com/dp/B001AS7C7U/?tag=skimlinks_replacement-20 I want...

Understood, but what I am confused about is why it was every connected to the drain line. Oh well, I'm going to remove that piping then.

The pipe I am referring to is in the OP where it goes straight up along the house, the previous picture I posted was that same pipe going into the basement and is connected to the drain line. And yes, it's connected through the backwater valve, which I don't understand.