Popular replacements
Replacement Refrigerator Water Filter for Frigidaire WF3CB PureSource 3 — 1 Pack$30.02- Replacement for LG LT700P Refrigerator Water Filter — 1 Pack$30.02
Aprilaire 35 Replacement Humidifier Water Panel by Tier1 (2-Pack)$44.70- Replacement Refrigerator Water Filter for GE XWF — 1 pack$30.02
- Replacement Refrigerator Water Filter for Samsung DA29-00003G (HAFCU1/XAA) — 1 pack$30.02
- Kenmore 9890 - 46-9890, ADQ72910902 Replacement Refrigerator Water Filter — 1 Pack$30.02
3M Filtrete 1000 Micro Allergen & Dust Defense Filter - 15x20x1$29.43
"The Original" Sump Alarm Low Tank Level Alarm — 120 Volt / 10 Foot$165.40
For Contractors
Repair parts and job-site supplies for HVAC, plumbing, electrical, septic, radon and roofing work, plus the recurring items you leave behind for the homeowner. Order online. Orders ship to U.S. addresses.
Radon Mitigation Supplies Mitigation fans, vent pipe, manometers and radon test kits, matched by model or pipe size.From $21.99
Septic & Wastewater Parts Alarms, floats, effluent filters, risers and lids, aerobic air pumps, UV bulbs and more.From $101.56
Sump & Effluent Pumps & Alarms Sump and effluent pumps, backup pumps, high-water alarms, floats and check valves.From $8.84
HVAC Air Filters Furnace and AC air filters by nominal size and MERV rating.From $29.43
Humidifier Pads & Wicks Whole-house and portable humidifier water panels, pads and wicks, matched by model or size.From $36.09
Batteries Household, coin-cell and hearing-aid batteries for alarms, remotes and devices.From $21.99
LED Light Bulbs LED bulbs by base, shape, color temperature and output, for homes and job sites.From $8.57
Refrigerator Water Filters Replacement fridge water filters matched by refrigerator model or filter part number.From $10.21
For Homeowners
Recurring filters, batteries, alarms, lighting and other household consumables, matched by size or model. Order online.
- HVAC Air Filters Furnace and AC air filters by nominal size and MERV rating.From $29.43
- Refrigerator Water Filters Replacement fridge water filters matched by refrigerator model or filter part number.From $10.21
Under-Sink, RO & Whole-House Filters Under-sink, reverse-osmosis and whole-house cartridges and membranes, matched by system model or size.From $13.46- Humidifier Pads & Wicks Whole-house and portable humidifier water panels, pads and wicks, matched by model or size.From $36.09
- Batteries Household, coin-cell and hearing-aid batteries for alarms, remotes and devices.From $21.99
- LED Light Bulbs LED bulbs by base, shape, color temperature and output, for homes and job sites.From $8.57
Pool & Spa Filter Cartridges Pool and spa filter cartridges and baskets, matched by filter or pump model.From $33.32- Septic & Wastewater Parts Alarms, floats, effluent filters, risers and lids, aerobic air pumps, UV bulbs and more.From $101.56
- Sump & Effluent Pumps & Alarms Sump and effluent pumps, backup pumps, high-water alarms, floats and check valves.From $8.84
- Radon Mitigation Supplies Mitigation fans, vent pipe, manometers and radon test kits, matched by model or pipe size.From $21.99
Find the right part
Air filter size lookup · Refrigerator part lookup · Part-number replacements · Shop by part number · Fix-it & buying guides
FAQ
What is MadMax Trade Supply?
A reseller of replacement parts, job supplies and recurring home-maintenance consumables for contractors and homeowners, based in Edina, Minnesota.
Do you serve both contractors and homeowners?
Yes. The catalog is grouped for contractors (repair parts, job-site supplies, mitigation and trade accessories) and for homeowners (recurring filters, batteries, alarms and similar consumables). Some categories appear in both groups.
Can I order online?
Yes. Add items to your cart and check out by card. Your card is authorized at checkout and charged when we confirm your order is in stock, usually within 1 business day; if we can't confirm it, the hold is released. Orders with items marked "Shipping calculated before payment link", or shipping to AK, HI, US territories or APO/FPO, get a secure payment link by email instead.
Can I subscribe for auto-ship?
Yes, for many filters, batteries and other consumables with shipping included: choose "Subscribe & auto-ship" every 1, 2, 3, 6 or 12 months on the product page or in your cart. Subscriptions renew automatically at the interval you choose, at the then-current price; we'll email you before any price change. Cancel anytime at madmaxsupply.com/subscription/ or by email. Not available for AK, HI, US territory or APO/FPO addresses.
How long does shipping take?
Orders ship to U.S. addresses. Typical delivery is a few business days in the contiguous United States. The delivery estimate is confirmed in your payment-link email. Included shipping covers the lower 48 states and DC only; for Alaska, Hawaii, Puerto Rico, other US territories and APO/FPO addresses we quote shipping in the payment-link email before you pay.
What is your return policy?
Most items can be returned within 30 days of delivery if they are new, unused and in the original packaging; the customer pays return shipping. Some items, such as certain batteries and LED lighting, have shorter return windows (7 days or 10 business days) shown on the product page; the window shown on the product page when you order applies. Email us with your order number to start a return. Full details are in our terms.
Do prices include tax and shipping?
Prices include the sales tax we pay at purchase (shown for Minnesota; your cart updates it for your ship-to state) and, where noted, shipping. No separate tax line. Most prices also include shipping within the contiguous US (lower 48 + DC); for AK, HI and US territories shipping is always quoted before payment. Items marked "Shipping calculated before payment link" do not, and any shipping charge is shown in the payment link before you pay.