Bronze Threaded Nipple, 3/4" Pipe, Close Length from GROCO
Bronze plumbing fittings.

Small Bronze Ball Valves with Brass Ball, 3/8" NPT from APOLLO
Free-floating, chrome-plated brass ball. NPT threads. Stainlesssteel handle. Note: These are for inline, non-saltwater applications.

Adapter—3/4" BSP Female to 15mm (Qty. 2) from WHALE PUMPS
Just cut the tubing to length and fully push the end into the appropriate fitting. The collet automatically secures the hose. If you ever need to alter the system, the connections can be disassembled and reused. All components are manufactured from nontoxic, food-grade materials and are designed to allow unrestricted flow. To gain the advantages of the Whale system, it is not necessary to replumb your entire boat, as unique adapters enable connection to most boat’s existing plumbing systems.

3-Way Bronze Ball Valve, 1/2" Size (NPT) from APOLLO
Use in place of a "T" fitting to switch between two tanks.

Full-Flow In-Line Ball Valve, 1" NPT from GROCO
These in-line ball valves permit unrestricted flow in all sizes. Each features a compact bronze body, chrome-plated brass ball with Teflon seats for long life, 304 stainless steel handle, bonding attachment screw and a drain plug.

Nylon Tee, NPT Threaded, 1/2" from SEAFIT
Nylon Tees, NPT Threaded.