Frequently Asked Questions
Everything you need to know about our premium water filtration systems.
How often should I replace my Doulton ceramic filter candle?
For optimal performance and water quality, we recommend replacing your ceramic filter candle every 6 to 12 months, depending on your local water quality and usage volume.
What is the difference between the various filter grades like SuperSterasyl and BioTect Ultra?
Each grade offers different levels of filtration. While all remove bacteria and cysts, advanced grades like BioTect Ultra also reduce heavy metals such as lead and organic chemicals like chlorine and fluoride.
Do you offer international shipping for your filtration systems?
Yes, we ship our products worldwide. Shipping costs and delivery times vary by destination and are calculated at checkout based on the weight of your order.
What is your return policy for unused products?
We offer a 30-day return policy for unused and unopened products in their original packaging. Please contact our support team to initiate a return authorization.
Are Doulton filters compatible with other brands of water housings?
Many of our standard 10-inch candles and cartridges are designed to be compatible with industry-standard housings, but we recommend checking the specific dimensions and thread types before purchasing.
How do I know when my filter is blocked and needs cleaning?
A noticeable drop in water flow rate is the primary indicator that the ceramic shell has filtered out enough sediment to require cleaning or replacement.