Pentair GRO-50EN 1:1 RO Membrane 50 GPD With Flow Control 4004424
SKU: 19487274994

Pentair GRO-50EN 1:1 RO Membrane 50 GPD With Flow Control 4004424

Sale price$125.10 Regular price$139.00
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Pentair GRO-50EN 1:1 RO Membrane 50 GPD With Flow Control 4004424The Pentair 4004424 GRO 50EN High Efficiency is an innovative next generation RO Membrane using "Thin Layer Composite" technology (TLC) to provide enhanced water recovery in an encapsulated membrane. Where traditional RO membranes have a 3: 1 ratio of 3 gallons of waste water to every gallon of purified water, the GRO 50EN new technology allows for a 1: 1 ratio of 1 gallon of waste water to every gallon of purified water; making it more water and

The Pentair 4004424 GRO-50EN High Efficiency is an innovative next-generation RO Membrane using "Thin Layer Composite" technology (TLC) to provide enhanced water recovery in an encapsulated membrane. Where traditional RO membranes have a 3:1 ratio of 3 gallons of waste water to every gallon of purified water, the GRO-50EN new technology allows for a 1:1 ratio of 1 gallon of waste water to every gallon of purified water; making it more water and energy efficient. Less waste water down the drain for the same amount of purified water means saving you money and the environment with the same great results! The Pentair 4004424 GRO-50EN model RO membrane includes a drainline flow control, a premeate check valve, a 96% rejection rate, 1/4" quick connect fittings and is 2.5 inches wide by 15.14" inches long with a production rate of 50 gallons per day.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 19487274994

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4.6 ★★★★★
Based on 1582 reviews
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LC
Boise, US
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
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Reviewed in the United States on February 18, 2026
L
Verified Purchase
Lucy Mejia
Omaha, US
★★★★★ 5
So will not write down your foot
Size: Medium, Color: (001) Black / Black / Castlerock
I love these socks. They have a little bit of gel on the top of the heel for support in your tennis shoes and so your socks don’t write down. Very good quality.
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Reviewed in the United States on May 6, 2026
T
Verified Purchase
Twins9
Waukegan, US
★★★★★ 5
Comfy and Stay Put
Size: Medium, Color: (002) Black / Black / Halo Gray
These socks are honestly great. They’re super thin and light, so once you have them on, you kind of forget they’re even there. No bulky feeling in your shoes at all. The best part is they actually stay on. I hate no-show socks that slide down after five minutes, and these don’t do that. The little grip on the heel really works, so you’re not constantly adjusting them all day. They’re breathable too, which is nice if your feet run warm. They dry fast and don’t get that gross sweaty feeling. And there’s no annoying seam on the toe, so nothing rubs or feels uncomfortable. Basically, they’re just comfy, stay put, and don’t cause problems — which is all I want from socks.
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Reviewed in the United States on January 16, 2026
S
Verified Purchase
swwkennyg
Boise, US
★★★★★ 5
Perfect sucks
Size: Medium, Color: (001) Black / Black / Castlerock
Wonderful socks . The weight is perfect !! These do not slip when in a shoe they stay out !!
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Reviewed in the United States on April 14, 2026
M
Verified Purchase
Monica Alzate
Draper, US
★★★★★ 4
Amazing but quality changed
Size: Large, Color: (002) Black / Black / Halo Gray
Love these socks so much, been buying them for about 4 years now!! Not giving them 5 stars anymore because the quality is different and not as good, durable and thick as before.
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Reviewed in the United States on July 10, 2025

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