MadMax Trade Supply
A green septic riser lid, a blank alarm box, a float switch and a short PVC pipe on grass and gravel.

Septic & Wastewater Parts

Replacement parts for residential septic, pump-tank and aerobic treatment systems, for licensed installers, pumpers and homeowners. Some work on septic systems requires a licensed professional under state and local rules; check before you DIY.

Available to order

Prices include sales tax (see terms). Items marked "Shipping calculated before payment link" have shipping calculated and shown in your payment link before you pay. Typical delivery is a few business days in the contiguous United States. A delivery estimate is confirmed in your payment-link email. Shipping to Alaska, Hawaii, Puerto Rico, other US territories and APO/FPO addresses is not included in any price; we quote it in your payment-link email before you pay. Images are representative; tap a picture to enlarge it.

Don't see your exact item? Email us the part number or size: tamara@madmaxsupply.com

Attributes we list for each item: Part type, Fits (system / model), Diameter or size, Voltage (if electrical).

Fix-it guides

Buying guides

FAQ

My septic alarm is going off. What should I do?

Silence the alarm, limit water use, and call your septic service provider. A high-water alarm can mean a pump, float or power problem. Replacement parts help only after the cause is known.

Can I replace an effluent filter cartridge myself?

Some homeowners do, but septic tanks hold dangerous gases. Never enter a tank, and follow your system maker's instructions and local rules, or hire a licensed pro.

Do you ship chlorinator tablets?

Chlorinator tablets are a regulated oxidizer with shipping limits. We will confirm shipping eligibility for your address before quoting.