For my fish room, I gave up the Python altogether, and ran 3 PVC lines permanently to each bank of tanks (each bank, had 3-5 tanks on a single sump)
Open a valve, and a bank of tanks was filled, close and open another, another bank filled. Made life very easy.
For getting rid of old water, a valve to a sump was opened, and old water went to the garden, this could change and exchange hundreds of gallons in only a few minutes.
I used a garden gang valve attached to a normal faucet without a problem.
The valve to no-where allowed temp check, and for rinsing new sand.
When the 2" valve, and its permanent line below was opened, old water went to the garden
My biggest problem, was forgetting I was filling a bank
This was solved by adding a float valve, that stopped water as the red float pushed against flow
Open a valve, and a bank of tanks was filled, close and open another, another bank filled. Made life very easy.
For getting rid of old water, a valve to a sump was opened, and old water went to the garden, this could change and exchange hundreds of gallons in only a few minutes.
I used a garden gang valve attached to a normal faucet without a problem.
The valve to no-where allowed temp check, and for rinsing new sand.
When the 2" valve, and its permanent line below was opened, old water went to the garden
My biggest problem, was forgetting I was filling a bank
This was solved by adding a float valve, that stopped water as the red float pushed against flow
