Wet storm water system

[mahns]

I am in the process of laying my storm water system to catch the ground water. The block slopes from front to back. The highest point in the storm water system will be at the front of the house which needs be 300mm below ground as it is covered be a driveway and a grated channel. I intend to run the pipes to the back of the block to a sump (600mm x 600mm x 700mm)and then pump it back out the road.

Due to the length of my house being so long by the time I get the pipe back to the sump the pipe will be some 350 mm below ground. I really want the inlet to the sump to be as high as possible to maximize the amount a water it can store and minimize the amount of times the pump turns on and off.

I am also trying to avoid burying the sump extremely deep.

Is it possible to have a wet storm water system where by the pipes would always have some amount of water and as they fill would effectively make the water go uphill and into the sump inlet.

Would this cause any problems with mosquitoes, smell etc?

Thanks in Advance

[Tony McC]

Water hanging in a pipe is NEVER a good idea. Not so sure mosquitoes are a problem yet: I know we're getting a bit of global warming, but the mosquitoes have, largely, steered clear of us up until now.

To comply with Building Regs, you MUST have a minimum fall on the pipe of 1:80, which is 12.5mm per linear metre. Determine the length of your pipe, multiply by 12½ and that is the amount of fall, in millimetres, you should create on the pipe. If it means extra digging for the wet well, then it means extra digging. We can't 'cheat' on drainage just because we don't like digging.