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The ROTH rmt-500-1p MultiTank is a 500-gallon polyethylene septic tank engineered for onsite wastewater management in residential and light commercial settings. Built with a watertight, corrosion-resistant poly construction, it is designed to handle the demands of septic, pump, holding, and cistern applications. Its low-profile footprint makes it a practical choice where vertical clearance or excavation depth is a limiting factor. Licensed plumbers and septic system installers specify this tank for new installations and replacement projects requiring a durable, long-service solution in ground-contact conditions.
The rmt-500-1p is suited for residential properties and light commercial sites requiring onsite wastewater containment. It functions in septic system primary tank roles, pump chamber configurations, holding tank setups, and potable or non-potable cistern applications. The tank's poly construction resists the corrosive effects of wastewater chemistry and soil contact, making it appropriate for a wide range of soil and climate conditions. Consult local health department regulations and soil perc data before specifying tank size and placement.
Designed as an OEM-style drop-in replacement or new-installation septic tank for residential onsite wastewater systems requiring a 500-gallon poly tank.
Installation must be performed by a licensed plumber or certified septic system installer in accordance with local health department permits and applicable plumbing codes. Power down any connected pump or control system before servicing or connecting tank components. Ensure proper bedding material and backfill compaction per local code to prevent tank displacement or deformation under load. Never enter a septic tank without confined space safety procedures in place.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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