Enhance the performance and reliability of your septic tank and percolation area system with the 4 Hole Distribution Box for Percolation Areas, the ideal distribution box for septic tank effluent dispersal component. Designed for efficient flow distribution from the septic tank to your percolation trenches or beds, this product ensures even effluent distribution, helping maintain soil absorption performance and protect against percolation field failures.
The 4 Hole Distribution Box for Percolation Areas complies with EPA recommendations for onsite wastewater systems when specified and installed correctly, providing a dependable distribution solution for residential and commercial septic system projects. As a critical part of your septic drainage infrastructure, it works to divide and route effluent from the septic tank to multiple percolation lines, supporting even load distribution across your soil treatment area.
Key Features & Benefits
EPA-aligned distribution box for septic tank systems, designed to support proper effluent dispersal.
Pre-assembled unit with covers, seals and screws included — ready for installation.
Up to 4 outlet configurations plus inlet capacity (4-5 hole design).
300 mm (12″) lockable green cover included for secure, flush-to-grade finish.
Pedestrian-rated cover capable of supporting foot traffic when secured with screws.
Accepts 2″, 3″ and 4″ (110 mm) pipe sizes with universal seals.
Versatile configuration options allow installers to cut and place inlets/outlets as needed.
Includes stabilizing feet for secure placement in the trench.
Can be used interchangeably as a distribution box or inspection chamber.
Constructed from durable polypropylene designed for long-lasting performance.
The 4 Hole Distribution Box for Percolation Areas is supplied with essential components — including seals, cover and screws — and arrives pre-assembled to streamline installation. It can be used with optional risers if a different cover height is needed at ground level.
Add our market leading water levellers (Rotoflow) when you want to achieve balanced levels of treated wastewater leaving the distribution box ensuring even distribution into outlet pipes – see more here
For best results and compliance with local wastewater regulations, installation should be completed by a qualified wastewater contractor or trained professional. Proper installation ensures uniform effluent dispersal into your percolation area, contributing to system longevity and efficient soil treatment.
Invest in a reliable and EPA-compliant distribution box for septic tank and percolation area projects — choose the 4 Hole Distribution Box for dependable performance and easier installation.

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