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PUMP NOISE 

Pumps are often noisy because they are sitting directly on a base with no anti-vibration insulation between.  Installation of our Acousticel M20AD anti-vibration mat between the bottom of the pump and the base on which it sits will absorb much of the vibration based noise often experienced.  This can be further enhanced if a patio slab is placed on top of the M20AD, another layer of M20AD glued to the slab with the pump attached to a layer of MDF which in turn is glued to the M20AD.  Particularly effective when applied to domestic shower pumps.

Airborne noise may also be a factor to be addressed and for this we recommend the pump is enclosed within a sound insulated box.  12mm MDF  is good for this and can be lined on the inside with our SA25FF/B/6 Sound absorbing Barrier and foam laminate.  (See illustration below)  This insulation is 33mm thick so the box will have to be of a suitable size to accommodate this.  A larger enclosure will give more effective noise reduction.

Finally, both inlet and outlet pipes from the pump should be flexibly connected.

If ventilation of the pump is required, a simple baffle system should be adopted as indicated below.

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