Install the tank tee
- Apply approved sealant (thread tape or pipe dope) to the threaded connection.
- Install the tank tee into the pressure tank.
- Position and tighten securely. Do not overtighten.
Tank Tee
Installation Guide
Brass / Stainless Options
A better install starts with the right tank tee.
The Merrill Tank Tee brings your pressure switch, gauge, drain valve, and relief valve together in one compact setup. Less hassle during installation, easier maintenance, and dependable connections built to last.
Buy Once. Install Once.
Before you start
SafetyTurn off electrical power to the pump. Shut off water and fully drain system pressure before loosening or installing fittings.
Check fit & parts
Confirm the tank tee size and thread type match your pressure tank and plumbing. Make sure you have the correct components for your system.
Tools & sealing
Have two wrenches, thread sealant or thread tape, and the required fittings ready before you start.
Main components
Four-step installation
Install tank tee › Add components › Connect water lines › Test system
Add the components
- Install the pressure gauge and pressure switch.
- Install the pressure relief valve and boiler drain.
- Use the appropriate threaded fittings (nipple, elbows, etc.) as needed.
- Follow the pressure switch manufacturer’s wiring instructions.
Connect the water lines
- Connect the incoming pump line to the tank tee.
- Connect the outgoing water line to your plumbing system.
- Install a ball valve (optional) as needed for service and isolation.
- Make sure all connections are tight and properly sealed.
Test the system
- With pump off, tank empty, set bladder tank pre-charge 2 PSI below pressure switch cut-in.
- Restore water and electrical power to the pump.
- Check for leaks at all connections.
- Verify proper operation of the pressure switch, gauge, relief valve, and drain valve.