Solid Brass Plug 1/4in Threaded Fitting Square Head Plug
1/4 Inch Square Head Brass Drain Pool Plug Fitting, Used On Pool Heaters with Cast Iron Headers, and On Brass Pool Pumps By StaRite, Anthony, AquaFlo. Brass Plugs Can Be Lubed with Green Lube Like Magic Lube Kevlar or Aqua Lube. They Can Also Be Used with Teflon Tape. Do Not Use Brass Plug In A Plastic Pump or Plastic Pool Heater Header.