Similar to Maggie Anne as derived from As the Prop Turns but also I also included a system for winterizing the raw water head and wash down intake and the ac unit intake. This is for our R23 LE with manual Jabsco head.
Fresh Water: 1/4" air hose quick connect, 1/4" MPT x 3/8" MPT adapter, 3/8" ball valve, 3/8" x 1/2" barb, 1/2" x 3" reinforced hose, 1/2" barb x 5/8" FPT, 5/8" MPT x 1/2" pex adapter, 1/2" pex to Jabsco threaded pump adapter.
Raw Water: 1/4" air hose quick connect, 1/4" MPT x 3/8" MPT, 3/8" ball valve, 3/8" MPT x 3/8" MPT, 3/8" FPT x 1/2" MPT, 1/2" FPT x 3/4" MPT, 3/4" MPT x 3/4" FHT.
Tee's: 3/4" barb x 3/4" barb x 3/4" MPT, 3/4" FPT x 3/4" MHT, 3/4" FHT cap.
Bucket: 5 gallon bucket with 3/4" FPT bulk head fitting, 3/4" MPT x 3/4" barb, 3/4" plastic hose, 3/4" barb x 3/4" MHT, 3/4" FHT x 3/4" MHT plastic ball valve, 3/4" FHT x 3/4" FHT.
Fresh Water Winterizing: As shown in How the Prop Turns plus with faucets closed use the air compressor to drain the water heater by using it's drain valve feature. Make sure drain valve is at the 6:00 position. It takes a few minutes and water will drain to the bilge. No pink required.
Raw Water Winterizing: Install tee downstream of the strainer. Connect to air compressor and with the through hull open blow air through the strainer and through hull. When water is purged close the through hull. Place head in "wet bowl" and purge raw water line to head. Place head in "dry bowl". Turn on raw water wash down and purge wash down system. We don't use pink in the head as it is detrimental to the Jabsco internals, especially the joker valve.
AC Winterizing: Purge AC strainer and through hull similar to raw water through hull. Fill bucket with two or three gallons of pink anti-freeze and connect to AC line tee. Open valve and run AC until pink is observed discharging from vessel. Turn off AC.
The bucket system is also useful for adding ant-freeze to the shower sump, sink drains and bilge systems.
Sorry for the long winded response.