50 GPD RO Membrane – Application & Use Case

A 50 GPD reverse osmosis (RO) membrane is commonly used in
traditional under-sink RO systems where efficiency and contaminant rejection are prioritized over
production speed. While this membrane size is not used in MyWaterClub countertop RO systems, it
remains a popular and reliable option for many standard residential RO installations.

Lower GPD membranes operate with a slower flow rate, which can support strong rejection efficiency.
As a result, 50 GPD membranes are often selected for applications where higher efficiency and a more economical
production rate are desired, especially in areas with moderate to high TDS.

What a 50 GPD RO Membrane Removes

Like other TFC (Thin Film Composite) reverse osmosis membranes, a 50 GPD membrane removes
contaminants by rejecting dissolved substances at the molecular level. Rather than targeting individual chemicals,
the membrane reduces entire classes of dissolved impurities, which allows it to reduce
thousands of potential contaminants that may be present in water.

Typical reductions include:

• Total Dissolved Solids (TDS)
• Fluoride
• Heavy metals (lead, arsenic, mercury, chromium)
• Nitrates / nitrites
• Dissolved salts & minerals (calcium, magnesium, sodium)
• Many dissolved inorganic and synthetic compounds

Actual performance depends on feed water quality, pressure, temperature, and proper pre-filtration.
Not all contaminants are present in every water source.

What Does 50 GPD Mean?

GPD (Gallons Per Day) refers to the maximum volume of purified water the membrane can produce under
ideal laboratory conditions (approximately 77°F / 25°C water temperature, ~60 psi pressure, and low TDS).
In real-world residential use, production is typically lower due to water temperature, pressure, and feed water TDS.

Approximate Production Per Hour (Real-World Estimate)

*Actual production varies with feed water pressure, temperature, TDS, and system configuration.

Why Choose a 50 GPD RO Membrane?

A 50 GPD membrane is a good choice if you use a traditional under-sink RO system and prefer an
efficient production rate with strong rejection performance. This membrane is typically not used in countertop RO
systems that rely on higher production rates to operate without a storage tank.

This membrane may be ideal if you:

• Use a standard under-sink RO system with a storage tank
• Prefer an efficient, steady production rate
• Do not require high daily output or fast production

Compatibility & Installation Notes

This membrane uses the standard 1812 size, making it compatible with many residential under-sink RO
systems designed for 50 GPD membranes.

Maintenance & Replacement

• Typical membrane lifespan: 2–3 years (depends on water quality and pre-filtration).
• Replace sooner if purified water production slows or TDS reduction decreases.
• Replace sediment and carbon pre-filters on schedule to protect the RO membrane and maintain performance.

Performance varies based on feed water conditions, pressure, temperature, and system configuration.

Brand: Aqua