EPP box

Insulation for fittings
Field of application
Heating and sanitary
Suitable for
Heating engineers & specialist insulators


Are you looking for inexpensive and universal insulation for your fitting? Then our EPP boxes are just right for you.

EPP boxes are available in 17 different shapes and in nominal widths from DN15 to DN50. This means we cover a large proportion of threaded fittings. We have created 2 extra series for connections with external threads. The boxes are available in anthracite and silver-grey.

The material EPP (expanded polypropylene) can be used up to a temperature of +110°C. With a thermal conductivity of 0.040 W/mK at 10°C and the calculated wall thickness, this insulation complies with the current GEG and EnEV. The EPP insulation is sealed using an integrated geometric closure, which makes external closures unnecessary. The different spindle diameters of the fittings and valves can be adapted to the specified spindle opening of the insulation using a punched soft foam adapter supplied. After all, the best insulation is useless if you don’t seal it and the draught passes through the insulation.

EPP boxes have been tested as molded parts (not just as raw material!) by the Materials Testing Office and have their own material test certificate. They have been tested in accordance with DIN 4102 and EN 13501-1.

The products are distributed via wholesalers.

The universal shapes of EPP boxes

With currently 17 shapes and nominal sizes from DN15 to DN50, we cover a wide range of socket fittings. Here you can get an overview.

Series M

For globe valves with female thread connection.

Series MS

For classic angle seat valves with internal thread.

Series MS-AG

For classic angle seat valves with male thread.

ST series

For balancing valves and angle seat valves with frontal drainage and female thread.

ST-AG series

For balancing valves and angle seat valves with face drain and male thread.

ST-BD series

For Danfoss LENO MSV-BD

ST-S series

For Danfoss LENO MSV-S

Series MT

For multi-valves and thermostatic valves with internal thread.

AB-QM 4.0 series

for Danfoss AB-QM 4.0 with threaded connection

Series KH

For ball valves with classic T-handle and female thread.

Series KH-Flat

For ball valves with short spindle and angled sheet metal handle and internal thread.

Series KH-B

For ball valves with wing handle and female thread.

Series KH-P

For pump ball valves, can be cut to length in several stages.

UP series

For concealed valves with internal thread.

Series Pipe

For pipe sections in station and plant construction

S-arm series

For welded pipe bends in station and plant construction

Series M arch

For screwed and pressed pipe bends in station and plant construction

Technical data

Material expanded polypropylene
Spec. Volume weight 45 – 55 kg/m³
Color anthracite or silver-grey
Thermal conductivity 0.035 W/mK at 10°C according to EN 12667
Application Heat up to 110°C
Fire protection class B2 according to DIN 4102 and E according to EN 13501-1

Measured values

Heat loss using the example of a Bender 1500 gunmetal IG DN50

On the safe side with our passport list

Using our comprehensive fitting list, the fittings from the various manufacturers can be quickly and easily assigned to the appropriate fitting insulation. You will also find dimensions, article numbers, technical data and other information.

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