Wide or deep - underground rainwater tanks come in a range of sizes. Split level block made for an interesting challenge. Downpipes connected to the rainwater system and surface drains/risers installed for the stormwater system. This one had to be dug by hand due to restricted access with live services in place. Double run, ready for the rainwater tank. Underground sump and pump installation. Once landscaping is complete, this sump and pump will be barely visible! Power run to the underground sump and pump, with an alarm attached for pump safety requirements. Installing an underground rainwater tank before this frame goes up. Completed underground tank. A small backyard doesn't mean, ideal for those small backyards A small backyard doesn't mean you still can't install a large rainwater collection system. Before: This patio area was prone to flooding due to the slope and poor existing drainage Tight access is never an issue for us! After: New sump and surface grates, ready for paving Before: New downpipes, stormwater and surface water drainage install After: Ready for the rainwater tank install