Reich Adapter from 28 mm Waste Water Pipe to 1" (25 mm) Hose - Grey Water Fitting for Motorhomes and Caravans
- Reich adapter for the 28 x 1.5 mm waste water pipe system with a spigot for 1" (25 mm) hose. It connects the rigid grey water installation to a flexible drain hose in motorhomes and caravans.
The Reich adapter for 1" (25 mm) hose is a transition piece in the push-fit 28 x 1.5 mm waste water pipe system. On one side it has a 28 mm diameter, the same as the pipe, so you push it into the socket of a coupling, elbow or T-piece. On the other side it has a narrower spigot for a flexible drain hose with an inner diameter of 25 mm. This lets you connect the rigid grey water installation to the hose from a sink, washbasin, shower tray or tank.

From 28 mm pipe to 25 mm hose
- wide 28 mm end for the socket of a Reich fitting
- spigot for 1" hose, that is 25 mm hose inner diameter
- length 57 mm
- push-fit into the socket, no glue, threads or welding
- works from -40 °C to +80 °C
- black, impact resistant plastic
The adapter is short, so it fits under a cabinet, behind a shower tray and in other tight spots of the interior.
How the Reich push-fit system works
The Reich waste water system consists of black 28 x 1.5 mm pipes and fittings: couplings, elbows, T-pieces and hose adapters. All parts are joined by simply pushing them together. You need no glue, no threads and no welding tool, and the manufacturer states that the joints are fully tight. This lets you build the grey water installation of a motorhome or caravan with basic tools and later take it apart, extend it or change the route.
When you need a hose adapter
Many drains in motorhomes and caravans come with a hose instead of a rigid pipe, for example a short section from the trap or the connection to a tank outlet. The adapter connects such a 25 mm hose to the Reich 28 mm pipe without replacing the whole installation. It also helps when you run the main line in rigid pipe with a steady fall and keep a flexible hose only at the end, where it has to get around an obstacle. If your hose is 19 mm, choose the other adapter of this series.
How to connect the hose
- Push the wide end of the adapter all the way into the socket of a Reich coupling, elbow or T-piece.
- Cut the hose square and push it over the full length of the narrow spigot.
- If the hose is exposed to vibration or tension, secure it with a hose clamp as well.
- Route the hose without kinks and with a fall towards the tank.
- After installation pour water into the drain and check the joint for leaks.
Installation step by step
- Plan the route from the sink, washbasin or shower drain to the grey water tank.
- Cut the pipe square to its axis, ideally with a pipe cutter, and remove burrs from the edge.
- Push the pipe all the way into the socket of the fitting.
- Lay the pipes with a steady fall towards the tank so that water drains by gravity and does not stand in the lines.
- Fix the pipes to the wall or floor with clips so that the joints do not move while driving.
- After installation pour water into the drain and check every joint.
Typical uses
- grey water installations in motorhomes, caravans and camper vans
- drains from the sink, washbasin and shower tray to the grey water tank
- repair and rebuild of existing installations with 28 mm pipe
- DIY conversions where quick assembly without glue matters
Matching parts
- Reich waste water pipe 28 x 1.5 mm, 2 m - the base of the whole installation
- Reich coupling 28 mm - joins two pipe sections in a straight line
- Reich 45° elbow 28 mm - a gentle change of direction
- Reich 90° elbow 28 mm - a right-angle change of direction
- Reich adapter for 19 mm (3/4") hose - from 28 mm pipe to hose
Technical data
| Parameter | Value |
|---|---|
| Manufacturer | Reich |
| System | Reich waste water pipes 28 x 1.5 mm |
| Part type | hose adapter |
| Pipe diameter | 28 mm (1.5 mm wall) |
| Diameter on the pipe side | 28 mm, for the socket of a Reich fitting |
| Hose spigot | 1" (25 mm) |
| Length | 57 mm |
| Connection | push-fit, no glue or screws |
| Medium | grey water (waste water from kitchen and bathroom) |
| Operating temperature | -40 °C to +80 °C |
| Colour | black |
| Material | impact resistant plastic |
| Weight | 10 g |
| EAN | 4037911331622 |
Frequently asked questions
Which hose does this adapter fit?
A flexible drain hose with an inner diameter of 25 mm, that is 1". You push the hose over the narrow spigot of the adapter.
Does the adapter go into the pipe or over it?
The wide end is 28 mm, the same as the pipe, so you push it into the socket of a Reich coupling, elbow or T-piece. To connect it to a straight pipe section, use a coupling.
Can I use the adapter for drinking water?
No. The adapter is part of the Reich 28 mm grey water drain system and is not meant for a drinking water installation.
Does it fit other 28 mm pipes?
The fitting is designed for Reich 28 x 1.5 mm pipes. With pipes from another brand tightness is not guaranteed, so it is best to use parts from one system.
Manufacturer
Reich GmbH, Ahornweg 37, 35713 Eschenburg, Germany.





