







Product information
The Weeplow® gravity system is built from food-grade AISI 304 stainless steel — the same grade used in commercial kitchens and food processing equipment. It resists corrosion, doesn't impart flavour, and stays looking sharp for years.
Each system ships with a pair of O'Pure 2 filter elements. These combine high-performance activated carbon with a hollow fiber ultrafiltration membrane operating at 0,02 microns, a meaningful difference from filters that rely on activated carbon alone. The pair handles up to 22,000 litres of water and typically lasts one to two years before replacement. The pair handles up to 22,000 litres of water and typically lasts one to two years before replacement.
No electricity. No plumbing. No installation. Set it on your worktop, fill the upper chamber, and pour filtered water from the lower chamber whenever you need it. It also works during power outages and in locations without mains infrastructure.
Specifications
| Model | Neptune |
| Capacity | 11L · ideal for 5+ people |
| Flow rate | up to 3.8 litres per hour |
| Diameter | 24 cm |
| Total system weight | 4.8 kg |
Certifications and Accreditations
The Neptune filtration system has been tested in real conditions by several independent laboratories around the world. It has notably been tested by independent laboratories in the United States. These analyses have demonstrated that our O’Pure 2 filters have a reduction capacity of nearly 99.99% on bacteria such as E. Coli. Analyses have also been conducted on forever chemicals (PFAS) that our filters reduce by more than 99.9%.
Furthermore, the laboratory SGS present in 140 countries around the world and recognized internationally for its expertise in the field of water has conducted several reduction analyses on our O’Pure 2 filters. Tests have thus been conducted on the MS2 virus that our filters reduce to 99.9999%, other analyses have been conducted on pesticides and heavy metals according to NSF/AISI standards 42-53.
Unlike other brands, we have deliberately chosen to conduct analyses in different laboratories in order to provide maximum transparency to our customers.
You will find below the analysis reports established by these laboratories.
Bacteria Analyses PFAS Analyses Virus Analyses Pesticides Analyses Heavy Metals Analyses
Weeplow® Neptune 11L
Choose your capacity: 11 L
Orders shipped within 1–2 days to local collection points or directly.
Your water filter is covered by a secure guarantee.
See how the system works, what's in the box, and how to set it up in under 20 minutes.
This gravity-fed water filtration system is manufactured from food-grade AISI 304 stainless steel, durable, corrosion-resistant, and made for daily use over years. It works with tap water, well water, or any potable source.
The system ships with two O'Pure 2 filter elements, combining activated carbon with a hollow fiber ultrafiltration membrane at 0,02 microns. Together, a pair of filters handles up to 22,000 litres of water before replacement, typically one to two years for most households.
What size should you choose?
2–3 people, or households where worktop space is limited
3–5 people, or anyone who prefers fewer refills
Larger households or higher daily water consumption
Product information
The Weeplow® gravity system is built from food-grade AISI 304 stainless steel — the same grade used in commercial kitchens and food processing equipment. It resists corrosion, doesn't impart flavour, and stays looking sharp for years.
Each system ships with a pair of O'Pure 2 filter elements. These combine high-performance activated carbon with a hollow fiber ultrafiltration membrane operating at 0,02 microns, a meaningful difference from filters that rely on activated carbon alone. The pair handles up to 22,000 litres of water and typically lasts one to two years before replacement. The pair handles up to 22,000 litres of water and typically lasts one to two years before replacement.
No electricity. No plumbing. No installation. Set it on your worktop, fill the upper chamber, and pour filtered water from the lower chamber whenever you need it. It also works during power outages and in locations without mains infrastructure.
Specifications
| Model | Neptune |
| Capacity | 11L · ideal for 5+ people |
| Flow rate | up to 3.8 litres per hour |
| Diameter | 24 cm |
| Total system weight | 4.8 kg |
Certifications and Accreditations
The Neptune filtration system has been tested in real conditions by several independent laboratories around the world. It has notably been tested by independent laboratories in the United States. These analyses have demonstrated that our O’Pure 2 filters have a reduction capacity of nearly 99.99% on bacteria such as E. Coli. Analyses have also been conducted on forever chemicals (PFAS) that our filters reduce by more than 99.9%.
Furthermore, the laboratory SGS present in 140 countries around the world and recognized internationally for its expertise in the field of water has conducted several reduction analyses on our O’Pure 2 filters. Tests have thus been conducted on the MS2 virus that our filters reduce to 99.9999%, other analyses have been conducted on pesticides and heavy metals according to NSF/AISI standards 42-53.
Unlike other brands, we have deliberately chosen to conduct analyses in different laboratories in order to provide maximum transparency to our customers.
You will find below the analysis reports established by these laboratories.
Bacteria Analyses PFAS Analyses Virus Analyses Pesticides Analyses Heavy Metals Analyses


Why choose us

Peace of Mind at Home
Know exactly what's in your water, and feel secure serving it every day.

Quality You Can Trust
Built and tested to meet recognised industry certifications and lab protocols.

Practical and Efficient
No complexity. Just consistent filtration you can rely on, day after day.

A Responsible Choice
A long-term solution that reduces waste and bottled water use over years of daily life.

Peace of Mind at Home
Know exactly what's in your water, and feel secure serving it every day.

Quality You Can Trust
Built and tested to meet recognised industry certifications and lab protocols.

Practical and Efficient
No complexity. Just consistent filtration you can rely on, day after day.

A Responsible Choice
A long-term solution that reduces waste and bottled water use over years of daily life.
How to Install the Gravity Water Filtration System
Follow our step-by-step guide to set up your gravity filtration system safely and effortlessly.
How our filtration system works
Engineered for simplicity and performance, our gravity filtration system delivers high-quality, better-tasting water through a carefully designed multi-stage process.

Fill the chamber
Pour your water into the upper chamber. No pressure, plumbing, or settings required.
Gravity does the work
Water passes slowly through the O'Pure 2 elements at 0.02 microns. The slow contact time is deliberate, it's what makes gravity filtration thorough.
Filtered water, ready to pour
Filtered water collects in the lower stainless steel chamber. It sits there until you need it with no power, no pump, and no waiting.
Montage facile même si j’ai utilisé une autre méthode pour remplir et amorcer les filtres . Différence évidente du goût de l’eau . Eau filtrée : aucun goût !
Ravie de mon achat …. Après quelques soucis d.erreur d’envoi de commande / retour mais ça ne concerne pas le produit .
Weeplow reçu bien emballé, montage simple... Juste un bémol concernant l'amorçage des filtres mais très bonne réactivité du service après vente. Depuis je goûte à une eau pure sans goût de Javel et débarrassée des polluants. Franchement, je recommande à 100%
Très bien ! L’eau est très agréable à boire, meilleure qu’une eau en bouteille du commerce.
Livraison rapide
Je recommande
J'ai acheté cette fontaine pour notre famille de 4 ( 2 adultes et 2 enfants) et elle est parfaite! On a juste eu un petit incident de remplissage les premiers jours ( on a rajouté trop d'eau à filtrer sans avoir tenu compte de la quantité restante dans le réservoir du bas, ça a débordé!) Mais on s'est vite adaptés et les enfants adorent se servir seuls.
Nous avons investi dans des gourdes en inox pour emporter partout (balade, travail...)
Je recommande +++
Filtration efficace et eau filtrée sans mauvais goût ni odeur de chlore. Parfait pour la consommation directe ou l’utilisation dans la cuisine et les boissons chaudes.
Bonjour, pourquoi avons-nous sauté le pas en nous procurant le Weeplow Neptune 11 l. ? En premier pour notre Santé, en second lieu, pour l’aspect écologique, plus de bouteille plastique à acheter et en 3 pour la partie financière. J’ai bien évidemment calculé le pour et le contre … Pour 2 personnes consommant 2x2 litres d’eau par jour, pour la cuisine, pour 1 animal de compagnie, je calcule 6 litres en moyenne par jour. Sur 6 ans, le système Weeplow + filtres consommation d’eau le revient à 464€. Par contre, si je prends de l’eau en bouteille à 0,25€/l., on atteint les 3287€ en 6 ans … le calcul est vite fait, nous faisons une économie de 2823€, mais le plus important est notre santé bien sûr. Je recommande sans hésitation Weeplow.
Nous sommes très heureux de notre acquisition. Eau très bonne et douce ( non acide ce qui est préférable pour la santé). Juste un pb de fuite au robinet à la mise en service mais résolu rapidement avec l’aide très réactive du SAV (bravo !) . De nombreuses questions avant l’achat et des réponses rapides et précises (encore bravo). Du tout bon nous concernant ! 👍merci
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Stainless Steel Support 5.6 L – 6 in
FAQs



From delivery to installation — here's what people ask us most.
What is the Weeplow® gravity water filtration system and what does it do?
The Weeplow® gravity water filtration system is a non-electric household water filter designed to improve the quality and taste of drinking water. Supplied with two O’Pure 2 filter elements, the system uses gravity-fed filtration to reduce a range of commonly found contaminants, including chlorine and sediments.
Under controlled laboratory test conditions, the O’Pure 2 filters have also been shown to reduce E. coli (a bacterium commonly used as a performance indicator in water filtration testing). As with all filters, real-world results depend on the quality of the source water, correct installation, and ongoing maintenance, so users should follow the instructions provided.
What is the list of undesirable elements removed by the Weeplow® O’Pure 2 filters?
The following elements are reduced by the Weeplow® O’Pure 2 filters:
- Coliforms
- E. Coli
- Lead
- Iron
- Mercury
- Chlorine
- Bisphenol A
- Chloramines
- Pharmaceutical products
- Petroleum contaminants
- Methylcyclohexane-methane
- Pesticides
- Heavy metals
This is not an exhaustive list. For more details, please consult our analysis reports.
How do I prime my Weeplow® O'Pure 2 filters before first use?
Regarding the priming of the O'Pure 2 filters, the following steps must be followed:
- Place the small beige gasket provided on the filter's thread to ensure that water properly enters the filters and does not splash everywhere.
- Then place the gasket against the tap.
- Slowly open the tap so that cold water flows through the filter.
- Hold the position for at least 2 minutes, then you will see the filter weeping water.
Once the filters are primed, install them in your system and perform one to two complete filtration cycles of 8 liters before consuming the water. Indeed, it sometimes happens that the water is cloudy during the first filtration cycles. This is generally due to residual dust trapped in the micropores of the filters. If necessary, you can also clean the tanks with hot water and soap before using them.
What is the lifespan of the Weeplow® O'Pure 2 filters? How often should the filters be replaced?
A pair of O’Pure 2 filters can filter up to 22,000 liters of water. This is a theoretical lifespan if certain conditions are met, namely that the water you are filtering is already relatively clean and that you take the time to maintain your filters according to the instructions provided in the instruction booklet that comes with the product.
On the other hand, if you are filtering water from an unreliable source, such as rainwater for example, and you do not take the time to maintain your filters, then the lifespan of these will be shorter.
Also, for optimal filtration, it is recommended to change the filters after 2 years of intensive use. Although the filters will still be able to effectively filter a good portion of contaminants even after 2 years, it is possible that their filtration power may be reduced on certain contaminants.
How to maintain the stainless steel tanks of my Weeplow® system?
Regarding the maintenance of stainless steel chambers, we recommend cleaning the chambers with soap and hot water once a month. In areas where the water is hard (rich in limestone), we suggest using pure vinegar or a 50-50% mixture of vinegar and water to spray and let sit for about 15 minutes. Finally, wipe everything with a ScotchBrite pad or a soft brush, then wash with soap and rinse. Clean each tank individually.
How to maintain the Weeplow® O’Pure 2 filters?
For the filters, our recommendations are to wash them every 2 months in cold water (always) and to gently scrub them using fine sandpaper or a toothbrush. Scrub one section of the filter until you notice some black residue on the pads, then move on to the next section. Finally, re-prime each filter, then reinstall it in your tank.
Why does my filtered water appear cloudy or taste unpleasant at first?
It is not unusual for the water to appear slightly cloudy or to have an unusual taste during the first use of a new filter. This is typically caused by harmless residual carbon fines (very fine particles) that can remain in the filter following manufacture and transport.
For this reason, we recommend running at least two full filtration cycles and discarding the water before regular use. Washing the upper and lower tanks with warm water and mild washing-up liquid before the first filtration can also help.
Cloudiness or taste issues may also occur if the filters have not been fully primed. In some cases, fine particles can remain trapped within the filter media during initial use. Priming the filters several times, as described in the instructions, usually resolves this and allows the filtration performance to stabilise.
Why and how to perform a food colouring test?
In certain situations, it happens that you do not fully trust your filters. Indeed, the filtration rate may seem too fast to you or the filtered water may have a slight taste at the outlet.
In order to isolate the problem as best as possible, it is often useful to perform the food colouring test.
To do this, add food colouring (without sugar and without thickening agent) to the upper tank of the Earth system. It will then take on a pink or red colour. Do not hesitate to mix everything so that the colouring spreads perfectly in the tank. The water that comes out of the filter must be completely clear. The best way to see this is to put a little water in a glass. You will then be able to judge at a glance whether the filtration system is working optimally.
A part of the water in the upper reservoir of my Weeplow® system is not flowing through the filters. Is this normal?
Yes, the fact that there is a little water left in the upper tank is normal and it generally concerns the last centimeters of water (between 1 to 2.5 cm). Due to the structure of the filter, water passes through very small micropores before entering the lower tank. The lower the water level in the upper tank, the less pressure there is to force the water through these micropores. You may have noticed that the system purifies much faster when the tank is full than when it is half full. This is because the pressure exerted on the water is greater.
I have been using my purification system for several months and the filtration speed has significantly decreased. Should I already replace the elements?
No, it is generally enough to clean your Weeplow® O’Pure 2 purification elements to revive them. The slow flow rate is often explained by the sediments and other residues previously filtered that clog the micropores of the purification elements. Simply remove the elements from your system and scrub the outside of each element with a stiff toothbrush or fine 3,000-grit sandpaper.
Scrub one section of the element until you see a bit of black on the pads, then move on to the next section. This simple process should only take a few minutes. Re-prime each element, then reinstall it in your unit. Your flow rate should be restored.
How long can I keep the water filtered by my Weeplow® system?
We advise against storing filtered water with a Weeplow® product for more than 3 days. Indeed, if you store your filtered water in a humid and/or warm environment, bacteria can develop again and multiply more quickly.
Are Weeplow® gravity filtration systems guaranteed?
Yes, our gravity filtration systems are guaranteed. The stainless steel chambers as well as the support and the faucet with gauge are all guaranteed for 10 years. In case of rust, leakage, or malfunction, we commit to replacing the item.
Regarding the charcoal filters, they are guaranteed for 1-2 years, depending on water quality, usage, and care instructions.
In case of a problem or question, do not hesitate to contact us by email at contact-uk@weeplow.com.
48 hours
Home delivery
100,000+
Satisfied customers
10 year
Warranty
EU Tested
Ships from the UK
7 days/week
Support
48 hours
Home delivery
100,000+
Satisfied customers
10 year
Warranty
EU Tested
Ships from the UK
7 days/week
Support
48 hours
Home delivery
100,000+
Satisfied customers
10 year
Warranty
EU Tested
Ships from the UK
7 days/week
Support









