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Hommix 100GPD Reverse Osmosis (RO) Membrane (TW30-1812-100)

£29.99 £24.99

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Proven, reliable, high-performance water purification Traditional filtration systems rely on a screen or filter (such as a carbon filter) to remove particles and improve water quality. Reverse Osmosis (RO) however is... Read more

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Proven, reliable, high-performance water purification

Traditional filtration systems rely on a screen or filter (such as a carbon filter) to remove particles and improve water quality. Reverse Osmosis (RO) however is a pressure-driven separation process where the water travels through the semipermeable membrane, pure water and waste water is separated.

The Hommix TW30-1812-100 is a standard size (12" x 1.8") RO membrane designed to be used with residential RO systems able to fit standard housings with a 100GPD water purification capacity.

The Hommix 100GPD RO membrane is made using a thin film composite (TFC), which is an RO membrane composed of and manufactured as three layers bonded together. The two base layers of the asymmetric design have a thin skin (3rd) layer of either polyamide or charged polysulfone deposited on the surface. 

Since this membrane is the standard size of 1812, it can be replaced with existing 50GPD, 75GPD and 80GPD membranes for tanks to fill up faster, especially with higher pressure water. 

Quality Assurance

  • 100% Inspection before shipment
  • Full automatic inspection and test
  • On-line quality control system Features


  • Dry type Membrane sheet
  • Membrane sheet from top-tier manufacturer
  • FDA certified thin film composite membranes
  • NSF performance test passed



 100% Inspection Complete production with line inspection and tests in the suppliers factory, quality control and statistical process control system.

The membranes are tested and certified by NSF International against NSF/ANSI Standard 58. These elements have been tested for the reduction of Arsenic, Barium, Cadmium, Chromium (Hexavalent), Chromium (Trivalent), Copper, Fluoride, Lead, Radium 226/228, Selenium, Turbidity, and TDS. 


Operating Limits

– Membrane Type
Polyamide Thin-Film Composite
– Max. Operating Temperature 113℉ (45℃)
– Max. Operating Pressure 125psi (8.6bar)
– Max. Feed Flow Rate 2.0 gpm (7.6lpm)
– pH Range, Continuous Operation 3.0 ~ 10
– Max. Feed Silt Density Index < 5
– Free Chlorine Tolerance < 0.1ppm


Model name Permeate Flow
Rate (GPD)
Applied Pressure
Psig (bar)
Stabilized Salt
Rejection (%)
Minimum Salt
Rejection (%)
TW30-1812-100 100 80 (5.5) 98 96 Dry type elements
TW30-1812-150 150 80 (5.5) 98 96 Dry type elements
  1. Permeate flow rate and salt rejection based on the following test conditions : 250ppm (NaCl) softened tap water, 77℉(25℃), 15% recovery, pH 7.5 and the specified applied pressure.
  2. Permeate flows for individual elements may vary ±20%.
  3. For the purpose of improvement, specifications may be updated periodically.
  4. The membranes are tested and certified by NSF International against NSF/ANSI Standard 58.


Collections are usually ready within 2 hours (unless stated otherwise, please call to confirm) at 47 Kempe Road, Enfield, Middlesex, EN1 4QT.

For collections, we will need to see the order confirmation email and 2 pieces of ID (photo ID and ID with your address on it, such as a utility bill). The IDs must match the billing name and address. 

Free Delivery (UK Mainland)

All products in stock under £50 are dispatched same day and posted via Royal Mail or MyHermes to be delivered within 3 - 5 working days. Orders must be placed before 15:00 (3:00pm) for same day dispatch. Please allow up to 7 working days for your item(s) to arrive. 

£5 for Next Working Delivery for items under £50

Free Next Working Day Delivery (UK Mainland)

All products in stock and priced over £50 will be dispatched the same day with next working day delivery when ordered before 13:00 (1pm). Order by 1pm Monday to Friday to receive your order next working day (orders dispatched the same day have a 99% next working day delivery but please allow up to 5 working days for your item(s) to arrive). 

Saturday Delivery - £25.00 (UK Mainland)

If you require your product to be delivered on a Saturday, please select the Weekend Delivery option. Orders must be placed by Friday before 16:00 (4pm) for Saturday delivery.

Special Requirements / Backorders

For special requirements and backorders (i.e. a unique tap colour and items out of stock but available on back order) please allow up to 4 - 5 weeks (you will receive emails from us with regular updates). 

Acquapuro 3-Way Taps

Hommix UK does not keep Acquapuro items in stock. These products are stored at Aqcuapuro's warehouses and dispatched by Aqcuapuro directly. Order must be placed before 13:30 (1:30PM) for next day delivery for these items. 

At Hommix UK we strive on customer support and you'll be updated of your order at every stage of the journey. Refunds will be handled through email if necessary.

International Deliveries

We deliver worldwide via express delivery, which usually takes 2 - 5 days. You can calculate the shipping price by selecting your country and entering your ZIP/Postal Code in the Cart page.

Unfortunately Hommix UK does not cover the charges for the local tax and for custom clearances. The receiver will need to cover the costs for these charges. You will receive an email with the relevant details including the chosen carrier as well as the tracking number. 


Our policy lasts 30 days. If 30 days have gone by since your order was received, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

To complete your return, we require a receipt or proof of purchase.

Please do not send your purchase back to the manufacturer but to Hommix UK including Acquapuro products. Our returns address is: 

Hommix UK
47 Kempe Road

There are certain situations where only partial refunds are granted (if applicable):

  • Any item not in its original condition, is damaged or missing parts for reasons not due to our error
  • Any orders placed with multiple items and you wish to return part of the item

Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days. You will receive an automated email regarding the refund once we have processed it.

Please allow 3 - 5 business days for the refunded amount to arrive back to the card. PayPal payments tend to be available instantaneously. 

Late or missing refunds (if applicable)

If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted.

If you’ve done all of this and you still have not received your refund yet, please email us at

Sale items (if applicable)

Both regular priced and sale priced items may be refunded, if you've purchased an item on sale, you'll be receiving the amount you've paid for the sale item.

Exchanges (if applicable)

We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to:

Hommix UK
47 Kempe Road


To return your product, you should mail your product to: Hommix UK, 47 Kempe Road, Enfield, EN1 4QT

We will provide you with a free returns label if your return is approved and it's a fault with the system.

Depending on where you live, the time it may take for your exchanged product to reach you may vary.

All returned items will be tracked and we will notify you of the progress. We advise you provide your email address or telephone number to be notified.

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Hommix 100GPD Reverse Osmosis (RO) Membrane (TW30-1812-100)

£29.99 £24.99