# Filter cap HydraPak HYF03N 42mm blue – replacement cap for 42 mm threaded hydration systems

**URL:** https://aio.lv/en/product--hydrapak-hyf03n--11389317
**Data updated:** 2026-02-14 19:46 (EET)
**Category:** Water Filters
**Manufacturer:** HydraPak
**Manufacturer code:** HYF03N
**EAN:** 0834456003236
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 36.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 30.57 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hydrapak-hyf03n--11389317

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.99 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

HydraPak HYF03N filter cap is a 42 mm blue replacement cap designed for compatible threaded hydration systems. It provides a convenient filter-cap solution for on-the-go water access, allowing basic filtration and secure closure of 42 mm openings. Suitable for outdoor activities, travel and everyday hydration, it offers easy installation and a compact form factor.

## Long description

The HydraPak HYF03N 42mm blue filter cap is a compact replacement cap designed for threaded hydration systems with a 42 mm opening. It integrates a basic filtration element and a secure screw-on closure to enable filtered water access from compatible bottles, reservoirs and hydration bladders. The cap is engineered for straightforward installation, compact storage and reliable sealing to reduce leaks during transport and use.
Advantages
The filter cap offers a lightweight, space-saving solution for adding basic particulate and taste reduction to water drawn from compatible 42 mm threaded containers. Its screw-top design ensures a tight connection and simple attachment without tools. The cap’s compact profile and durable construction make it suitable for packing into day packs or luggage while maintaining a practical filtration function for casual outdoor and everyday hydration.
Suitable for
Day hikes and short outdoor trips
Travel and commuting where quick filtered access is needed
Replacement for lost or damaged 42 mm threaded caps on hydration bottles and reservoirs
Everyday use for filtered drinking from compatible containers
Key specifications
Diameter: fits 42 mm threaded openings
Material: durable polymer body with integrated filter element
Color: blue
Connection type: screw-on threaded cap for 42 mm necks
Weight: lightweight and compact design suitable for packing
How to use
To install, align the cap with the 42 mm threaded opening and turn clockwise until the cap seats securely. Ensure threads are free of debris before attaching to achieve a proper seal. Use the filter cap for drinking directly from the container or as a point-of-use filter while pouring; follow routine cleaning by rinsing the cap and filter element with clean water and allowing it to air dry. Inspect the filter element periodically and replace the cap if damage or wear affects sealing or filtration performance.
Usage recommendations
Use the cap only with compatible 42 mm threaded hydration containers. Do not rely on the integrated filter for microbiological decontamination of untreated water from suspect sources; for high-risk water, use a certified purification method. Clean after each use and store dry to prolong service life.

## FAQ

### How much does the HydraPak HYF03N 42mm filter cap cost, and is it available for purchase?

The price is 36.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 29 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 10.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All HydraPak products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized HydraPak service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11389317/68522303_large.webp