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For hot water on demand in compact spaces, the Ideal 10L Undersink Water Heater 2 kW (WH66010) is a versatile, hard-working solution designed for kitchens, washrooms, offices and small commercial areas where traditional hot water systems aren’t practical. This under-sink heater delivers efficient performance right where it’s needed most — without wasting energy heating unused pipework.
Equipped with a robust Incoloy heating element and corrosion-resistant anode, it’s built to withstand ongoing use and resist deterioration over time. Ideal’s compact design fits neatly beneath a sink or counter, and the external temperature control lets you tailor hot water output to match demand. Simple to install and quick to commission, this 10-litre unit offers a cost-effective hot water boost for localised applications.
Whether you’re supplying hot water to a hand basin, kitchenette, workshop sink or utility room tap, this efficient under-sink water heater ensures hot water is always close at hand.
Key Features
Technical Specification
| Brand | Ideal |
|---|---|
| Provided by | TJ O'Mahony |
| Delivery Rule | small & light |
Last update: 17 August 2026
We offer reliable delivery services throughout the Republic of Ireland, with straightforward delivery charges for both trade and DIY customers. Delivery options are confirmed at checkout based on your order and delivery Eircode.
| Delivery Type | Delivery Area | Delivery Charge | Delivery Time |
|---|---|---|---|
| Small Items | Republic of Ireland | €9.99 | 3–4 working days |
| Large & Heavy* | Standard delivery area | €29.99 | 5–7 working days |
| Extra Large* | Standard delivery area | €50.00 | 5–7 working days |
| Paint 5L or less** | Standard delivery area | €19.99 | 5–7 working days |
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
30-Day Returns
TJ O'Mahony offers a 30-day returns policy on eligible unused products, giving you additional time beyond the statutory 14-day cooling-off period applicable to most online consumer purchases.
Eligible products can be returned for a refund or exchange within 30 days of delivery or collection, provided they are unused, in their original and re-saleable condition, complete with all supplied parts and accessories, and accompanied by proof of purchase.
Please note: Return restrictions apply to certain products, including Mixed Paint, certain Bagged Building Products, Solid Fuel, Special Order, Non-Stock and Catalogued Products. Your statutory rights in relation to faulty, damaged, incorrectly supplied or non-conforming goods are not affected.
