Vaillant recoVAIR replacement seal 75/62 mm (10 pcs)

Product detailed description

Replacement seal 75/62 mm, 10 pcs (Vaillant recoVAIR, code 0020180826)

Set of replacement sealing rings for all sockets of the 75/62 mm ducting system of Vaillant recoVAIR – essential material for servicing, maintenance and expansion of the ducting.

The replacement seal 75/62 mm is a genuine set of ten sealing rings from the Vaillant recoVAIR range, designed for replacing worn, damaged or lost seals on any socket within the 75/62 mm diameter ducting – i.e. on adapters, elbows, straight couplings and end pieces of this accessory family. Every single connection in the entire 75/62 mm ducting is fitted with exactly this type of rubber sealing ring, which ensures an airtight connection between the hose and the respective fitting socket – and since a typical installation may contain several dozen such connections, this is material whose availability is crucial for any service intervention on the system.

Why seals wear out over time

The sealing rings are made of a flexible elastomer (rubber) which, thanks to its elasticity, fills microscopic irregularities between the outer surface of the fitting socket and the inner surface of the fitted hose, thus creating an airtight connection. However, this elasticity gradually decreases slightly over years of operation due to several factors: repeated temperature cycles (especially in unheated attic spaces, where the temperature fluctuates significantly throughout the year), long-term mechanical stress caused by minor vibrations of the recoVAIR unit's fan, and, to a lesser extent, natural material ageing caused by oxygen and UV radiation (although in concealed installation spaces this exposure is significantly lower than in outdoor applications). The result of this gradual ageing is a slight decrease in seal elasticity, which after many years of operation may manifest as a minor leak at the given joint.

When it is necessary to replace the seal

• During regular maintenance of the recoVAIR unit – if the service technician detects visible wear or loss of elasticity of any sealing ring while replacing filters or performing periodic system inspection, preventive replacement is recommended before an actual leak occurs at the joint.
• When dismantling and reassembling a connection – if any part of the ducting needs to be temporarily disconnected (for example for cleaning, repair or route modification), the original seal may be slightly damaged or lose its original shape during this handling, so it is recommended to use a new sealing ring instead of the original one during reassembly.
• When a drop in airflow is detected on a branch – if a service technician measures that the actual flow at an outlet is lower than would correspond to the fan setting and any flow limiters, one of the possible causes is a leak at one of the connections on that branch, caused by a worn seal.
• After accidental mechanical damage – for example due to careless handling of the hose during other construction work near the ducting.

How the seal replacement is carried out

Replacing a sealing ring requires briefly disconnecting the hose from the respective socket – i.e. cutting or loosening the fixing strap and pulling the hose off the socket. The original, worn seal is then removed from its groove on the socket and replaced with a new piece from this set, which is carefully seated exactly into the same groove so that it fits evenly around the entire circumference and is not twisted or pushed out of its track anywhere. After fitting the new seal, the hose is pushed back onto the socket up to the retaining lug and secured with a new fixing strap (we recommend combining this with genuine Vaillant fixing straps, code 0020231957, also available in our offer). The whole process takes only a few minutes per connection, but requires a certain amount of skill and care so that the new seal is not damaged during its own installation.

Why use a genuine seal and not a universal replacement

The size, hardness (material density) and exact cross-section profile of the genuine Vaillant sealing ring are designed precisely to fit the given groove and socket, so that once seated they create a reliable airtight connection without the need for any additional sealing with silicone or other material. Universal rubber O-rings available in general technical supply stores may have a different cross-section diameter or different material hardness, which can either lead to a leaking connection (if the ring is too thin or soft) or to difficult installation and a risk of damaging the socket when fitting the hose (if the ring is too thick or hard). Using a genuine seal therefore guarantees the same standard of tightness as the connection had during the original installation by the manufacturer.

Material and durability

The sealing rings in this set are made of a flexible elastomer resistant to the normal temperature range found in concealed installation spaces of a house, as well as to the slight condensate moisture that may occasionally occur on exhaust branches of the ducting during colder months of the year. The material is also resistant to minor mechanical abrasion caused by repeated fitting and removal of the hose during service interventions, allowing repeated disassembly and reassembly of a given connection without the need to replace the seal at every single intervention – replacement is only necessary once visible wear or loss of elasticity of the material is observed.

Recommended inspection frequency

Although sealing rings typically last many years without replacement under normal operation, we recommend including a visual inspection as a standard service step whenever the filters of the recoVAIR unit are replaced (usually 2 to 4 times a year depending on filter class and operating conditions). On this occasion, it is advisable to check at least those connections that are easily accessible through inspection openings (for example at the recoVAIR unit itself or at the manifold), while connections hidden deep within the ceiling structure are usually only checked once an airflow problem is detected on that branch, since direct inspection would require partial disassembly of the structure.

Storing replacement seals before use

Unused sealing rings should be stored in a dry, temperature-controlled environment away from direct sunlight and away from contact with solvents, oils or other chemicals that could degrade the elastomer material even before use. When stored in the warehouse of a service or installation company, we recommend planning consumption within a horizon of months to the first few years, not decades, in order to preserve the full elasticity and sealing function of the material for its later use.

Frequently Asked Questions (FAQ)

Who this product is intended for

The replacement seal is basic service material for technicians performing regular maintenance, inspections and repairs of Vaillant recoVAIR controlled ventilation systems with heat recovery, as well as for installation companies that need to replace a potentially damaged seal during installation before handing the system over to the investor. It is advisable to always have this set available as part of standard service equipment, since it is material with a high probability of being needed during any inspection or repair visit to an older installation.

Step-by-step seal replacement procedure

1. Switch off the recoVAIR unit or at least reduce its output to a minimum, so that you are not exposed to a draft from the operating fan while handling the open ducting, and so that excessive dust does not enter the system during the intervention.
2. Loosen or cut the fixing strap at the given connection so that you can pull the hose off the fitting socket without much resistance – be careful not to damage the hose itself with a sharp tool during this step.
3. Pull the hose off the socket with a gentle, even pull along the axis of the duct, not at an angle or sideways, so as not to deform the socket or surrounding fitting parts.
4. Remove the old seal from its groove – if needed, use a blunt non-metallic tool (for example a plastic scraper) to avoid scratching the surface of the groove or the socket itself.
5. Clean the groove and adjacent surface of the socket of dust, grease or remnants of the old seal with a dry cloth, so that the new seal seats evenly around the entire circumference.
6. Insert the new seal from this set exactly into the groove, and check by hand around the entire circumference that it is not twisted, folded or partially pushed out of its track anywhere.
7. Push the hose back onto the socket as far as it will go or up to the retaining lug, again with an even pull along the axis of the duct.
8. Secure the connection with a new fixing strap (we recommend genuine Vaillant straps, code 0020231957) and check visually and by gently pulling the hose that the connection holds firmly and does not move.
9. Put the recoVAIR unit back into operation and at the next opportunity (for example during the next service visit) verify that there is no audible air leak at the connection and no drop in flow on the respective branch.

Overview of the entire accessory range for 75/62 mm ducting

The replacement seal is part of the wider family of genuine Vaillant recoVAIR parts for 75/62 mm cross-section air ducting, which in systems with a central manifold is used for the "last mile" between the manifold and individual rooms. The table below shows an overview of this entire range – the currently viewed product is highlighted.

All the parts listed share the same 75/62 mm cross-section and are therefore fully compatible with each other – when ordering replacement seals, it is therefore practical to also consider the condition of other parts on the same route and possibly order fixing straps or another worn component at the same time, so that the service intervention does not need to be repeated shortly afterwards.

Why order via atria.sk

We supply this part as a genuine Vaillant replacement part through an authorised wholesale distributor of heating and ventilation technology, WINTNER s.r.o., which guarantees the authenticity of the material, correct dimensions and preservation of the warranty conditions for the entire recoVAIR system. When ordering replacement parts, we also recommend checking the code of your specific recoVAIR unit model (VAR 60/4, 150/4, 260/4 or 360/4) and contacting us in case of any doubts – we will be happy to help you choose the correct replacement parts for your specific ducting system.

Safety and environmental aspects

The elastomer sealing rings do not contain any hazardous substances requiring special handling or disposal – worn pieces can normally be disposed of together with mixed waste, unless local regulations state otherwise. No personal protective equipment beyond ordinary care when working with small technical material is needed when handling new or old seals. Maintaining the airtightness of the entire ducting through functional seals has, besides comfort (no draughts or noise from leaking connections), a direct energy impact as well – a leaking duct forces the fan of the recoVAIR unit to run at higher speed in order to achieve the designed airflow, which increases electricity consumption and operating noise.

Summary and package contents

The package contains 10 replacement sealing rings for 75/62 mm ducting, suitable for replacing a worn or damaged seal on any socket within this accessory range of the Vaillant recoVAIR system. This is genuine service material directly from the manufacturer Vaillant, essential for maintaining the long-term airtightness and energy efficiency of the entire controlled ventilation system with heat recovery. Combined with regular inspection and genuine fixing straps, this set represents a reliable and affordable way to extend the service life and maintain the declared efficiency of the entire air ducting for many more years of operation.