Isn't there supposed to be 2 black o rings for the membrane?

As far as I know, the membrane doesn't come with o rings. If you buy the housing it does come with the o rings.

Cual es el máximo Tds de trabajo para esta membrana?

Concentration of Solution - maximim 2000 ppm

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💧 Elevate your water game with pro-grade purity and power!

TRUSTED US INNOVATION - ISO 9001 certified, designed by experts for North American water challenges.
LONG LASTING BPA FREE - Dry-stored for freshness, built to last 24-36 months with safe materials.
VERSATILE COMPATIBILITY - Fits top models like AG4040FF & RE4040-BE for seamless integration.
UNMATCHED FILTRATION POWER - Eliminate 99.5% of salts & heavy metals for crystal-clear water.
ENGINEERED FOR PEAK PERFORMANCE - Optimized 90 ft² membrane area ensures maximum throughput and durability.

The Max Water BW-4040 is a premium 4"x40" reverse osmosis membrane delivering up to 2400 gallons per day with 99.5% contaminant rejection. Engineered with 90 ft² of thin-film composite membrane, it’s optimized for brackish water and compatible with leading filtration systems. Designed and certified in the USA, this durable, BPA-free membrane offers long-lasting, high-performance filtration ideal for car washes, industrial, and whole-house applications.

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Brand	Max Water
Model Number	104299
Color	Bw-4040 2400 Gpd
Product Dimensions	10.16 x 10.16 x 101.6 cm; 3.63 kg
Material	Polyamide Thin-Film Composite
Special Features	100% dry-stored membrane maximizing shelf life., More consistent performance with less fouling requiring less frequent cleaning and change outs., Provides stable, high rejection of contaminates even with high TDS water sources.
Item Weight	3.63 Kilograms

Max Water 4" x 40" BW-4040 2400 GPD Brackish Water RO Membrane Perfect for Car Wash, Whole House & Industrial Applications | Compatible with AG4040FF, RE4040-BE and More for Versatile Water Solutions

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