REMS Calc-Push electric descaling pump, 21 L tank, ≤ 30 L/min
- Tank capacity: 21 L
- Flow: ≤ 30 L/min
- Pressure: ≤ 0.1 MPa (1 bar / 15 psi)
- Head: up to 10 m
Where Calc-Push is used
For professional plumbing and heating maintenance. Typical targets — water heaters (electric, gas instantaneous), DHW cylinders (100-1000 L), boiler internals, plate heat exchangers, heating and cooling networks. Fill the 21 L tank with acidic descaler, connect via included hoses, and select flow direction with the 3-way lever — forward, reverse, or zero (pause for measurements and chemical soak).
Technical specifications
| Parameter | Value |
|---|---|
| Code | 115900 (R220 variant) |
| Manufacturer | REMS |
| Model | Calc-Push |
| Tank capacity | 21 L |
| Flow rate | ≤ 30 L/min |
| Pressure | ≤ 0.1 MPa (1.0 bar / 15 psi) |
| Head | Up to 10 m |
| Max solution temperature | ≤ 50 °C |
| Electric motor | Capacitor, 230 V / 50 Hz / 165 W |
| Flow control | 3-way manual lever (forward / zero / reverse) |
| Dimensions | 35 × 35 × 52 cm |
| Weight | 9.2 kg |
When to choose Calc-Push
- Instantaneous electric and gas water heater cleaning
- DHW cylinder (100-1000 L) descaling
- Heat exchanger and boiler CIP cleaning
- Closed heating and cooling network descaling
- When manual flow control (3-way lever) is required
- Compatibility: closed water/process systems with stainless, copper, steel; non-aggressive chemicals
B2B delivery and logistics via Amegata.lt
- 24-hour delivery across Lithuania (from our warehouse in Vilnius)
- Competitive B2B pricing — often below market average
- 30-day payment terms for companies (per contract)
- Free technical consultation on cleaning procedure
Official REMS catalogue: rems.de/Calc-Push (115900)
Frequently asked questions
Any acid allowed?
No. Recommended: REMS chemicals (CleanH + NoCor). Do not use concentrated hydrochloric, nitric, or sulphuric acids — they will damage seals and may corrode system pipes.
How does it differ from ROMATIC 20?
REMS Calc-Push — 21 L tank (larger), 30 L/min flow, manual 3-way lever. Rothenberger ROMATIC 20 — 15 L tank, 40 L/min, automatic programmable flow reversal. Calc-Push suits jobs needing manual control and larger chemical volume.
Maintenance?
After each use — flush tank and hoses with clean water. Annual pump seal check for heavy users (100+ cycles/year).
Suitable for home use?
Technically yes, but 165 W motor and 21 L tank are for professional use. For home — smaller manual pumps or periodic professional service is sufficient.
Warranty?
Standard REMS warranty — 12 months for professional use (per registered order documentation).
