1/2" NPT Pipe, 1/2" Hose ID from SEAFIT
Nylon Fittings, Female Pipe-to-Hose.

Hose Adapter, From 1-1/8" to 3/4"-5/8" from RULE INDUSTRIES
#69 is stepped & adapts from 1-1/8" to 3/4" - 5/8" #57 is an elbow & adapts from 1-1/8" to 1" NPT #67 adapts from 1-1/2" to 1-1/8".

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.

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

Tee Type Sanitation Hose Fitting, Slip Fitting Thread from SHIELDS RUBBER
Fiberglass-reinforced nylon fittings designed to fit Shields Series 101, 148 and 144 hoses without heating or special tools. Use in sanitation systems, deck drain systems and water tank fill.

Barbed Hose Reducer, 3/8" to 5/8" from SEAFIT
Nylon Hose Reducers, Barbed.