If you use an external Truma Ultraflow pump then you will need the very similar looking Truma compact housing. It says "Truma Ultraflow Water Intake" on the front lid. It can't be used as an external shower point!
eBay
High Pressure Washer Water Filter Inlet Connector Replacement Tool, Water Pump Inlet Hose, Garden Adapter.
Aliexpress UK
For use with the Truma Ultraflow inlet hose with strainer. Truma Ultraflow water inlet housing, in white. The Isle of Wight, Isle of Man, Channel Islands and Northern Ireland. Window & Roof Lights.
eBay
10PCS Washing Machine Water Inlet Valve Filter Screen Wave Wheel Washing Machine Water Inlet Pipe Filter Washing Machine Part
Aliexpress UK
Truma Ultraflow Water Inlet Housing. No electrical connections in the housing, not to be used with external Ultraflow water pump.
eBay
High Pressure Washer Water Filter Inlet Connector Replacement Tool, Water Pump Inlet Hose, Garden Adapter.
Aliexpress UK
This is the “Larger” Ultraflow housing and has an inlet for use with an external Truma Ultraflow pump, it also has an outlet for the optional feature of a Truma outdoor shower hose/head. Caravan Parts.
eBay
New G1/2" 30/40/60/80cm Black Nylon Water Inlet Hose Faucet Hose Water Heater Pipe Toilet Connection Cold Hot Mixer Inlet Pipe
Aliexpress UK
This is the “Larger” Ultraflow housing and has an inlet for use with an external Truma Ultraflow pump, it also has an outlet for the optional feature of a Truma outdoor shower hose/head. Genuine Truma Part.
eBay
3/4" High Pressure Washer Water Filter Inlet Connector Replacement Tool Water Pump Inlet Hose Garden Hose for Garden Adapter
Aliexpress UK
Genuine Truma Ultraflow Grey Plastic Winter Compact Water Housing. "Truma Ultraflow Compact" on the front lid. Caravan Parts. If you have an onboard pump then you will need aTruma water intake housing.
eBay
For Truma Ultrastore Spare 850W Water Heater Replacement Element 70020-00270 Water Heater Element Immersion Heater 70020-00270
Aliexpress UK
Water Filter Housing White Filtapac. Based on the now discontinued Carver Crystal 2 water housing design. Recess Depth (max) 210mm. For all your caravan and Camping needs. Hole Size 95mm X 150mm. Sound & Vision.
eBay
RV Water Heater Dust Cover Handheld Removal Tool RV Water Heater Maintenance Accessories For Truma Caravan Camping Mortorhome
Aliexpress UK
For use with the Truma Ultraflow inlet hose with strainer.
eBay
Household Pre-water Heater Filter Free Filter Element Replacement Water Inlet Tap Water Anti-scaling Water Purification Filter
Aliexpress UK