When low water pressure is affecting showers, taps and appliances, the Multiboost 350L Simplicity Rectangular Coffin Tank delivers a robust, packaged solution for improving pressure and flow in domestic and light commercial properties. Designed to work as part of a pressure booster system, this all-in-one unit combines a 350-litre non-corrosive storage tank, pump and controller — giving you consistent water delivery even in low mains pressure areas.
The rectangular coffin-style tank is engineered to maximise usable water storage while fitting neatly into utility rooms, garages, plant rooms or under stair voids where headroom may be limited. Its WRAS-approved construction ensures reliable performance with potable water, and the included controller manages automatic pump activation based on demand. Intelligent dry-run protection safeguards the pump against damage while easy-access unions simplify installation and servicing.
Whether addressing low supply pressure or supporting multiple outlet demands, the Multiboost Simplicity Rectangular system delivers a practical pressure-boosting solution that’s built to last.
Key Features
Complete Packaged Set: Integrated storage tank, pump and control system for reliable pressure boosting.
350L Rectangular Coffin Tank: Large capacity and low-profile design for space-restricted installations.
WRAS-Approved Tank: Safe and certified for potable water applications.
Automatic Demand Control: Controller activates pump when water is drawn.
Adjustable Start Pressure: Customise cut-in pressure settings to match system requirements.
Dry-Run Protection: Protects the pump and extends service life.
Service-Friendly Connections: Quick-release unions simplify maintenance and future servicing
Technical Specification
Product Code: 1081647
Product Name: Multiboost 350L Simplicity Rectangular Coffin Tank
System Type: Integrated cold water pressure boosting system
Tank Capacity: 350 litres (WRAS-approved, non-corrosive)
Tank Orientation: Rectangular coffin-style for low-head installations
Controller: Automatic demand sensing with adjustable start/cut-in pressure
Protection Feature: Dry-run shut-off with auto-restart delay
Pump: Integrated booster pump (model specific)
Connections: Standard inlet and outlet unions for ease of installation
Ideal For: Domestic and light commercial water pressure boosting applications
Installation: Horizontal placement; suitable for utility areas or plant rooms
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 Charges & Delivery Times
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
Swipe sideways to compare delivery options.
Small Items
Delivery area
Republic of Ireland
Charge
€9.99
Delivery time
3–4 working days
Large & Heavy*
Delivery area
Standard delivery area
Charge
€29.99
Delivery time
5–7 working days
Extra Large*
Delivery area
Standard delivery area
Charge
€50.00
Delivery time
5–7 working days
Paint 5L or less**
Delivery area
Standard delivery area
Charge
€19.99
Delivery time
5–7 working days
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
Additional Information
FREE delivery on eligible Small Items and Large & Heavy orders over €1,499, within the standard delivery area only.
Special Order and Catalogue Products require an additional 5 working days.
FREE collection of old appliances is available through WEEE Ireland when purchasing qualifying large appliances.
FREE Click & Collect is available for items in stock at your selected branch.
Large & Heavy and Extra Large items are available within our standard delivery area only.
Paint delivery Paint in tin cans 5L or less is available for delivery. Larger sizes and paint supplied in plastic buckets are available for Click & Collect only.
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.
