posted 1 year ago
I like the thinking, but remember volume multiplies by pipe radius (3.14159 x radius squared), so a 1/2” will move .785” sq vs a 4” pipe moving 12.56”sq. The friction will also be much higher in the soaker hose. I would also foresee it becoming forever garbage that will break down but not decompose biologically in the soil.
Woody debris filled trenches will apparently greatly outlast pipe or gravel in functional drainage lifespan. Ancient Roman woody debris backfilled drainage structures in Britain functioned for over a thousand years. The British literature on these around many old castles uses a term for bundled sticks that could be considered offensive in the US (“f@&&%t drains”). I have used these with good results in my property and designs, but would not use them within 10ft of a structure as they will decompose and settle. This is also a consideration for foot traffic safety as it can form an ankle turner. If these are overriding concerns, I would still forego the pipe if possible and use drainage rock and the pavers to form a cavity. A cleanout could even be devised with a removable paver.
This is all just my opinion based on a flawed memory