# Straight double union for flat gasket Comap 18×3/4 — model 4359 GL

**URL:** https://aio.lv/en/product--comap-e131012001--11825147
**Data updated:** 2026-03-09 11:14 (EET)
**Category:** Kitchen & Bathroom Faucets
**Manufacturer:** Comap
**Manufacturer code:** E131012001
**EAN:** 3430650328884
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--comap-e131012001--11825147

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

Straight double union (dwuzłączka) from Comap, model 4359 GL, designed for use with a flat gasket. Connection size 18×3/4 as specified. Intended for joining pipes or fittings in plumbing systems where a flat gasket seal is required. Suitable for installation and maintenance tasks in residential and commercial water or heating installations.

## Long description

Straight double union Comap 18×3/4 — model 4359 GL is a mechanical connector designed for joining two pipe ends or fittings with a flat gasket seal. Manufactured by Comap, this straight double union is intended for plumbing and heating systems where a reliable, compressive gasket joint is required. The component provides a compact inline connection with a union nut on each side to compress the flat gasket and ensure a leak-resistant joint in potable water or heating circuits.
Advantages
The straight double union offers a simple, serviceable connection that can be assembled and disassembled without rotating the pipes, easing maintenance and replacement. The flat gasket interface provides uniform sealing pressure and is compatible with common gasket materials used in plumbing installations. Its straight, inline design minimizes flow disturbance and fits standard 18×3/4 connection dimensions used in residential and commercial systems.
Suitable for
Connecting copper, steel or plastic pipe fittings in domestic plumbing
Joining sections in heating circuit manifolds and radiators
Installations where a flat gasket seal is specified
Maintenance tasks requiring frequent disassembly and reassembly
Key specifications
Connection type: straight double union with flat gasket sealing
Nominal size: 18×3/4 (compatible with corresponding threaded fittings)
Material: corrosion-resistant metal suitable for potable water and heating systems
Sealing: flat gasket compressed by union nuts for uniform pressure
Design: inline, union-nut assembly for non-rotational pipe disconnection
How to use
Prior to installation, ensure mating surfaces and the flat gasket are clean and free of debris. Insert the gasket into the union seat and align the two pipe ends or fittings. Hand-tighten both union nuts, then use appropriate wrenches to tighten to a level that compresses the gasket evenly without over-torquing. After assembly, pressurize the system and inspect for leaks; if leakage is detected, slightly retighten the union nuts or replace the gasket if damaged. For disassembly, loosen the union nuts and separate the connection without rotating the pipes.
Usage recommendations
Use gasket materials compatible with the system medium and temperature. Avoid excessive torque on union nuts to prevent gasket deformation. When used in heating systems, verify compatibility with system pressures and temperatures and perform a pressure test after installation.

## FAQ

### How much does the Straight double union Comap 4359 GL cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 97 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 29.06.2026 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 Comap 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 Comap 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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