# Drainage air admittance valve McAlpine MP50-50C-PB 50 mm for plumbing ventilation

**URL:** https://aio.lv/en/product--mcalpine-mp50-50c-pb--11822732
**Data updated:** 2026-03-09 11:11 (EET)
**Category:** Sinks & Sink Accessories
**Manufacturer:** McAlpine
**Manufacturer code:** MP50-50C-PB
**EAN:** 5036484082688
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 38.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 32.22 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mcalpine-mp50-50c-pb--11822732

## 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

McAlpine MP50-50C-PB is a 50 mm drainage air admittance valve designed for plumbing ventilation to admit air into drain systems and prevent sewer gases entering buildings. It fits 50 mm pipe connections and is used in domestic and light commercial drain and soil stacks where traditional venting is impractical. Suitable for retrofit or new installations to maintain trap seals and improve drainage performance.

## Long description

McAlpine MP50-50C-PB is a 50 mm drainage air admittance valve engineered for plumbing ventilation in domestic and light commercial installations. The valve admits air into drain systems to equalize pressure and prevent negative pressure from siphoning trap seals, while also providing a one-way barrier against sewer gases entering the building. Designed to fit standard 50 mm pipe connections, it can be used in both new installations and retrofits where traditional external venting is impractical.
Advantages
The valve provides reliable pressure balancing in drainage systems without the need for roof penetrations. Its compact 50 mm connection simplifies installation into existing soil and waste stacks or branch fittings. The one-way sealing mechanism helps maintain trap water seals and reduces the risk of sewer gas ingress. Constructed for use in typical domestic and light commercial environments, the component supports improved drainage performance and quieter venting compared with unvented systems.
Suitable for
Domestic and light commercial drain and soil stacks with 50 mm pipework
Retrofit installations where roof venting is not feasible
New builds requiring concealed or internal ventilation solutions
Situations needing protection of trap seals from negative pressure
Key specifications
Connection size: 50 mm
Function: Air admittance (one-way air inlet and gas barrier)
Intended application: Drainage and plumbing ventilation
Suitable environments: Domestic and light commercial
Installation type: Inline or branch fitting for soil and waste systems
How to use
Install the valve on a vertical branch or soil stack at a point accessible for service, ensuring the connection matches 50 mm pipework and the valve is oriented per manufacturer guidance. The unit should be fitted above the highest fixture served or in accordance with local plumbing codes to allow air admission while maintaining trap seals. After installation, check for secure joints and test fixtures to confirm proper drainage and absence of sewer gas odors. Follow all applicable standards and regulations for plumbing ventilation in your jurisdiction.
Usage recommendations
Use this valve where traditional external venting is impractical, and confirm compatibility with local plumbing codes. Periodic inspection is advised to ensure the valve operates freely and maintains a tight seal against sewer gases.

## FAQ

### How much does the McAlpine MP50-50C-PB 50 mm air admittance valve cost, and is it available for purchase?

The price is 38.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 McAlpine 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 McAlpine 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

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