Specifications
6.3 Diffuser Installation
1. For easy installation the EPDM flat-gaskets can be moistened with a lubricant.
2. A commercial grade water-based soap (concentration 5% - 10%) is recommended as
lubricant. Lubricants containing mineral oils or hydrocarbons are not allowed.
3. Thread the stainless steel double nipple into the diffuser and put on the flat-gasket (or
the special round tube adapters).
4. Place the free end of the double nipple through the outlets of the lateral pipe and put on
the second flat-gasket (or adapter). Thread the second diffuser onto the double nipple.
5. Hand tighten both diffusers by rotating clockwise. Tighten both units an additional 1/2
to 3/4 turn with 2 fork wrenches contacting at the across flats. DO NOT OVERTIGHT-
EN. Adjust the across flats horizontal for both diffusers with a tolerance of ± 10° (see
sketch).
Now the perforated areas of both diffusers are optimally orientated and will show a uni-
form bubble pattern.
6. Use as installation tool, commercial available fork wrenches with across-flats dimension
of 55 mm.
7. During tightening the membrane must not be deformed, otherwise a non uniform bubble
pattern might occur or a possible tear up of the perforated membrane leads to leakage.
8. Both flat-gaskets (or adapters) must be equally deformed for proper sealing, otherwise
separate the diffuser, adjust the gaskets and tighten again. Replace an irreversible
deformed or damaged flat-gasket (or adapter).
9. The non-perforated area must be on top and bottom. (Details see page 11.)
