# Pump Controller TECH ST-21BUFOR white — ST-21BUFORWH compact wall-mounted unit

**URL:** https://aio.lv/en/product--tech-tsst21buforwh--11959805
**Data updated:** 2026-03-11 13:59 (EET)
**Category:** Control Systems
**Manufacturer:** TECH
**Manufacturer code:** TSST21BUFORWH
**EAN:** 5901445470661
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 97.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 80.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tech-tsst21buforwh--11959805

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

TECH ST-21BUFOR is a wall-mounted pump controller in white finish (model ST-21BUFORWH). Designed to manage and protect circulation pumps, it provides basic control and monitoring functions for heating and water systems. Suitable for residential and light-commercial installations, it helps automate pump operation, improve system reliability, and simplify maintenance.

## Long description

TECH ST-21BUFOR white is a compact wall-mounted pump controller designed for managing and protecting circulation pumps in heating and domestic water systems. The unit provides basic automation that starts and stops the pump according to system conditions, offers protection against dry-running and overload, and simplifies integration into residential and light-commercial installations. Its white housing and compact footprint allow installation on boiler room walls or inside service cabinets while keeping controls accessible for routine checks and adjustments.
Advantages
The controller delivers reliable pump protection and straightforward control logic in a compact, wall-mount format. It supports automatic start/stop according to configured parameters and includes built-in safeguards to reduce the risk of pump damage. The white casing and clear control layout facilitate installation and user interaction without occupying significant space. Designed for common circulation pump types, the device helps reduce manual intervention and contributes to smoother system operation.
Suitable for
Residential central heating circulation systems
Domestic hot water recirculation
Small commercial heating installations
Retrofit projects replacing basic manual pump controls
Pump protection where space is limited
Key specifications
Mounting type: wall-mounted compact unit
Functionality: automatic pump start/stop and protection
Protection features: dry-run detection and overload protection
Enclosure color: white
Controls: front-accessible settings for operation and safety parameters
Typical applications: circulation pumps for heating and domestic hot water systems
How to use
Install the TECH ST-21BUFOR on a secure vertical surface near the pump or inside a service cabinet, ensuring compliance with local electrical regulations and correct mains supply connection. Connect pump power and control wiring according to the system diagram, set the operating parameters using the front-access controls, and test automatic start/stop and protection responses during initial commissioning. Regularly inspect wiring and terminal connections and verify that safety features such as dry-run detection are functioning as part of routine maintenance.
Usage recommendations
For reliable operation, match the controller settings to the pump specifications and the hydraulic characteristics of the system. Ensure electrical installation is performed by a qualified technician and verify protection functions after any pump replacement or significant system changes. Avoid exposure to excessive moisture or direct water spray and keep the enclosure closed to maintain protection.

## FAQ

### How much does the TECH ST-21BUFOR pump controller cost, and is it available for purchase?

The price is 97.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 03.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can TECH ST-21BUFOR pump controller be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All TECH products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized TECH service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11959805/67405210_large.webp