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Wiltec 20-24L Membrane Pressure Tank Vessel Expansion for Domestic Waterworks BUTYL

Domestic water pump
Price in EUR including VAT
Delivered between Thu, 11.6. and Fri, 12.6.
More than 10 pieces in stock at third-party supplier
Supplied by
Wiltec DE
Free shipping starting at 30,–

Product details

The replacement diaphragm for most common 20 and 24 litre diaphragm pressure boilers, as used in sanitary cold/hot water systems, domestic waterworks, solar and pressure maintenance systems and garden pumps. The diaphragm is made of butyl rubber and is therefore suitable for drinking water.

Butyl rubber:

This rubber belongs to the elastomer group. The plastic is characterised by its resistance to hot air, weathering and the influence of ozone. The elastomer has low gas permeability, good chemical resistance and very good damping properties against vibration and impact energy up to 100 °C.

In the low temperature range, butyl rubber remains elastic down to -70 °C. The main areas of use and application for butyl rubber are air hoses and tyre liners, heating bellows, steam hoses and tank linings. Other applications include films, membranes and unvulcanised sealing compounds and tapes.

Butyl rubber is also known as IIR (isobutene-isoprene rubber).

14-day cancellation right
30-day right of return
24 Months statutory warranty
Legal concerns

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Reviews & Ratings

Statutory warranty score

How often does a product of this brand in the «Water pumps» category have a defect within the first 24 months?

Source: Galaxus
  • 8.Kärcher
    1,9 %
  • 9.Makita
    2,1 %
  • 10.Einhell
    2,3 %
  • 11.Wiltec
    2,4 %
  • 12.AL-KO
    3,8 %

Statutory warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Galaxus
  • 1.Gardena
    0 days
  • 1.Makita
    0 days
  • 1.Wiltec
    0 days
  • 4.Einhell
    3 days
  • 5.AL-KO
    4 days

Return rate

How often is a product of this brand in the «Water pumps» category returned?

Source: Galaxus
  • 7.AL-KO
    2,1 %
  • 8.Gardena
    2,2 %
  • 9.Kärcher
    2,3 %
  • 10.Makita
    3,8 %
  • 10.Wiltec
    3,8 %
Source: Galaxus