The Polylok 7-Hole Distribution Box is designed with installers in mind, offering a straightforward, reliable solution for percolation area installations on septic tank and wastewater treatment systems. It provides consistent, even distribution of treated wastewater and helps ensure long-term system performance with minimal on-site adjustment.
This 7-hole distribution box allows for up to 6 outlet connections (1 inlet), giving installers flexibility when laying out percolation pipes. Even flow across all outlets helps prevent overloading individual trenches and supports efficient infiltration into the percolation area. The inlet and outlet positions make pipe alignment simple, saving time during installation.
Supplied ready to install, the box includes 7 seals as standard, removing the need to source additional fittings. The seals provide secure, watertight connections and reduce the risk of leakage or ingress once backfilled. Compatible with standard pipe sizes, this distribution box integrates easily into new installations or system upgrades.
The unit is fitted with a wide 500 mm green pedestrian-rated cover, giving excellent access for inspection and future maintenance. The large opening allows installers and service technicians to visually check flow levels, make adjustments, or carry out inspections without difficulty. The green finish blends neatly into grassed and landscaped areas, making it ideal for residential sites where appearance is important.
Manufactured from durable polypropylene, the Polylok distribution box is built to withstand ground pressure and harsh site conditions. It doubles as an inspection chamber, providing ongoing access throughout the life of the system and reducing call-backs after installation.
Designed specifically for percolation area installations
7-hole layout supporting up to 6 outlet pipes and 1 inlet
7 seals included as standard – no extra parts required
500 mm green pedestrian-rated cover supplied
Wide opening for easy inspection and servicing
Quick, straightforward installation on site
Suitable for septic tanks and wastewater treatment systems
Durable polypropylene construction
Functions as both a distribution box and inspection chamber
Ideal for landscaped and residential environments
Order with Rotoflow 4″ weirs to ensure 100% balanced flow to each outlet. Need a smaller 4 outlet option? Then Click Here!

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