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Orifice shields
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Orifice shields

Orifice diffuser shield to fit 32-40mm PVC pipe with hole on top of pipe.
NZ $4.50

Any wastewater treatment system is only as effective as its weakest link, which for most of these systems is the drain holes in the distribution fields. These holes become restricted, or plugged altogether, by the drain media itself.

Orifice shields protect the discharge holes in pressurised systems from the outside. They ensure even distribution from all orifices in any system by separating the discharge orifices from the drain media or ensuring even distribution of spray. Orifice Shields come with discharge slots that face down and are available in sizes to fit pipes sized ¾ inch, 1 inch, 1 ¼ inches, 1 ½ inches and 2 inches.

Key features

  • Large open area that prevents blockage and allows effluent drainage
  • 228mm inches of gripping surface
  • Easily snaps into place
  • Stays securely in place, even after back-filling
Manufactured by SIM/TECH Filter in the USA

How they work

Drain media can block the small discharge holes, throwing the whole design and operation of a system out of whack. The second image above is an illustration of the drain media blocking a discharge outlet in a lateral pipe.

Orifice shields ensure even distribution. Installed on the lateral piping of a system, the orifice shield creates a protective void between the drain media and the discharge hole (see third image above). The design allows the discharge hole to spray effluent into the shield where the much larger open area of the shield keeps the hole discharging at its design flow rate.


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Contact Information
Phone: 03 543 9057
0800 255 356
58 Gladstone Road
Richmond 7020
New Zealand