Alde Corner Expansion Tank – 3010/3020/3030 Compatible – 3000‑421

About this product

The Alde Corner Expansion Tank is an official Alde hydronic system component designed for installations where a corner‑mounted reservoir is required. It replaces earlier Alde corner‑style tanks used across caravan and motorhome heating systems. This component provides the correct specification for customer‑led refurbishment, system upgrades, or replacement of discoloured or cracked tanks.

Key product details

• Model supplied: Alde Corner Expansion Tank • Part number: 3000‑421 • Compatibility: Alde 3010 / 3020 / 3030 systems • Replaces: Earlier Alde corner‑mounted expansion tanks • Interface / function type: Hydronic expansion reservoir • Included items: Tank body only (no hoses, clamps, or fixings supplied) • Additional features: – Corner‑mount design for compact installations – Transparent body for glycol‑level visibility – Suitable for closed‑loop Alde heating systems

Pricing and order requirements

Each expansion tank is priced individually. Customers typically purchase one tank per heating system. No minimum order quantity applies.

Typical use context

Commonly used when replacing or upgrading the expansion reservoir within Alde 3010 / 3020 / 3030 hydronic heating systems. Customers typically install this part during system refurbishment, modernisation, or when replacing discontinued Alde corner‑style tanks.

Compatibility notes

Compatibility varies between caravan and motorhome manufacturers and model years. Customers usually confirm: • Existing expansion tank model • Alde system model (3010 / 3020 / 3030) • Mounting location and available corner space • Hose diameter and routing • Condition of the existing glycol and system pressure

Aperture / mounting information

• Earlier Alde corner tanks → same functional footprint • OEM installations → customers typically check hose length and routing • Direct replacement → no system modifications normally required

Compatibility matrix

Installation notes

This component is designed to replace earlier Alde corner‑mounted expansion tanks using the existing system layout. Customers typically check:

• Mounting points and corner space • Hose diameter and condition • Routing of the existing glycol return line • Access to the installation area

Components are supplied as raw materials for customer‑led projects. Customers often follow Alde’s published fitting guidance or consult a qualified technician if required.

Important Considerations (Disclaimer)

• Customers should check their existing Alde boiler model before ordering • Confirm all dimensions, hose sizes, and available mounting space • Ensure the tank is compatible with the correct Alde hydronic system • Components are supplied as raw materials for customer‑led projects • Customers often check delivery access and installation space before fitting • No installation instructions are provided; customers typically refer to Alde’s published guidance or seek professional assistance if required

Information Accuracy & Reliance

• All product information is supplied for general guidance only • No guarantee is given that the details are complete, up to date, or applicable to every installation scenario • Customers are responsible for independently verifying all specifications, measurements, and system requirements before purchase

Specification table

What’s included

One Alde Corner Expansion Tank (3000‑421) supplied as described. Price is per unit.

Delivery & handling notes

Components are securely packaged for courier delivery. Customers often check access to the installation area before fitting.

Internal links

• Alde Heating & Control Systems • Alde Spares • Adhesives & Fixings • Electrical Installation Accessories