Janet A asks:
Does anyone know how to do this, or how much it will cost to hook up one shower to a toilet and sprinkler?
Answer by Chas
It would cost more than it would be worth. First you have to collect the shower water, then you have to pump it to a storage tank and then you have to get it to the toilet and/or the sprinkler system.
An overhead gravity feed tank will work for the toilet but getting it to the sprinkler system can be a real hassle and there isn’t enough water from a single shower to really help a sprinkler system.