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Ideal 8 and 18-Liter Water Softener
Budget Water Softeners
Introducing the Ideal water softener
Compact · simple · durable · economical
Compact size, simple lines, durability, ease of use, and an affordable price: the Ideal was designed to offer excellent value for money.
The included bypass: what does it do?
All OJA water softeners come with a bypass that makes it easy to switch between softened and untreated water.
1. Keep using your water during maintenance
If a problem occurs or your water softener needs servicing, the bypass routes water around the unit to maintain your home's water supply.
2. Adjust residual hardness
Overly softened water may be undesirable in some installations. Adjusting the bypass lets you blend in some untreated water to achieve an appropriate residual total hardness (TH).
Valve settings and features
Automatic regeneration management
- Regeneration control in 4 stages
- LED display with 4 digits and icons
- Dual ceramic disc system for service and regeneration
- Automatic locking function
- Top-mounted automatic valve
- Volume-based and/or timed countercurrent regeneration
- Delayed, immediate, or enhanced regeneration
- Programming based on capacity and water hardness
- Auxiliary input for remotely starting regeneration
- Auxiliary output for controlling external equipment
- Clock backup battery lasting up to 3 days
- Bypass included
Specifications
Technical specifications
Ideal 18 L and Ideal 8 L comparison
| Specifications | Ideal 8 L Water Softener | Ideal 18 L Water Softener |
|---|---|---|
| Model | Ideal 8 L | Ideal 18 L |
| Control system | BNT-1650 valve | BNT-1650 valve |
| Regeneration type | Downflow | Downflow |
| Meter built into the bypass | Yes | Yes |
| Hardness removal Salt dosage: 6 lb/ft³ |
399 g | 923 g |
| Media preloaded | Yes | Yes |
| Resin quantity | 8 L | 18 L |
| Resin type | Very high-capacity ion exchange resin - Exclusive | |
| Tank size | 08 × 17 inches | 08 × 35 inches |
| Salt storage capacity | 16 kg | 46 kg |
| Nominal service flow rate | 1.0 m³/h | 1.5 m³/h |
| Backwash | 2 min | 4 min |
| Brining duration | 24 min | 48 min |
| Rinse duration | 1 min | 2 min |
| Refill duration | 3.8 min | 8.3 min |
| Salt used per regeneration Dosage: 6 lb/ft³ |
0.77 kg | 1.73 kg |
| Water used per regeneration | 37 L | 81 L |
| Continuous flow rate at a 1 bar pressure drop | 4,500 L/h | |
| Peak flow rate at a 1.72 bar pressure drop | 5,900 L/h | |
| Backwash flow rate @ 25 psi | 1,600 L/h | |
| Pipe size | 3/4" or 1" | |
| Plumbing connections | 3/4" and 1" straight fittings included | |
| Electrical requirements | 110–120 V / 220–240 V AC · 50/60 Hz | |
| Dimensions | 225 × 512 × 648 mm | 225 × 512 × 1,112 mm |
| Shipping weight | 16 kg | 30 kg |
| Water supply | Municipal water | |
| Water temperature | 3 to 38 °C | |
| Water pressure | 0.14 to 0.86 MPa | |
Sizing: value given for a hardness of 30 °f, adjustable according to your water's hardness level.
Formula: resin volume × 5,000 / hardness.
Regeneration time: less than one hour.
Power supply: 110–220 V / 50–60 Hz.
Calculate Your Needs
How do you choose the resin volume?
Size your water softener in 4 steps
1. Estimate your daily water needs
Simply take your bills for the year, add up the billed water volumes, and divide by the number of days you were at home.
Reference: average water consumption in France is around 150 liters per day per person.
2. Decide on the water volume between regenerations
For example, if you live with your partner, you use about 300 liters of water per day.
If your goal is to regenerate the resin in your Ideal every 7 days on average, you get 2,100 liters.
3. Measure your water hardness
Tests are available as strips or a liquid at any home improvement store.
4. Calculate your resin needs
Calculation formula
Resin volume = Water volume between regenerations × TH / 5,000
Water hardness in France
Map showing approximate water hardness by region

Installation & Maintenance
Installing your water softener
Our water softeners are available with or without installation.
You have several options for getting your unit up and running:
1. Hire your plumber
Your local plumber can handle the installation. They can also contact us before the installation if they need additional information.
2. Install your water softener yourself
An installation manual is included with your water softener to guide you through the installation.
See the steps for installing your water softener yourself →Configuring your Ideal water softener
Settings and startup
Maintaining your water softener
Maintaining our water softeners is simple and helps preserve their performance over time.
We recommend regularly checking your water hardness (TH).
The specified range is 5 to 10 °f.
Warranty
Our units come with a 2-year warranty.
An extended warranty of up to 5 years is also available.
Documents
User manual
Get the user manual for your Ideal water softener in PDF format.
Download the user manual →
