# Hydroland 4-sided white control knob PT-4B

**URL:** https://aio.lv/en/product--hydroland-5900308735190--11717761
**Data updated:** 2026-03-08 11:18 (EET)
**Category:** Home Appliance Accessories
**Manufacturer:** Hydroland
**Manufacturer code:** 5900308735190
**EAN:** 5900308735190
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.49 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 3.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hydroland-5900308735190--11717761

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Hydroland PT-4B is a 4-sided white control knob designed for manual adjustment of valves, switches or instruments that accept a square mounting shaft. The compact plastic knob provides a defined grip for rotational control and is suitable for household or light industrial applications where a square (4-angle) shaft interface is required. Easy to install and replace.

## Long description

Hydroland 4-sided white control knob PT-4B is a compact plastic knob engineered for manual adjustment of valves, switches and instruments that use a square (4-sided) mounting shaft. The knob provides a defined grip and positive engagement with four-angle shafts, allowing controlled rotational input in household and light industrial settings. Its plain white finish integrates with a range of panels and devices while keeping the design unobtrusive.
Advantages
The PT-4B delivers straightforward mechanical coupling to square shafts without additional adapters and offers a simple, low-cost solution for replacing worn or missing knobs. The plastic construction makes it lightweight and resistant to common indoor environments, and the four-sided form ensures repeatable alignment and torque transmission. Installation is quick and requires minimal tools, making it convenient for maintenance and retrofit tasks.
Suitable for
Manual adjustment of valves with a square shaft
Control shafts on household appliances and HVAC components
Replacement of damaged knobs on instruments and switches
Light industrial equipment requiring simple rotational control
Key specifications
Shape: four-sided (square) mounting interface
Color: white
Material: plastic
Mounting: push-fit or friction-fit onto square shaft
Application environment: household and light industrial use
How to use
Align the knob’s square bore with the square shaft and push the knob onto the shaft until it seats securely. If the original installation used a retaining clip or set screw, reinstall or tighten it to secure the knob. For removal, gently pull the knob from the shaft; use a flat tool to leverage the base if the fit is tight. Verify smooth rotation and secure engagement before putting the device back into service.
Usage recommendations
Use the PT-4B in applications with compatible square shafts of matching dimensions and within normal indoor temperature ranges. Avoid prolonged exposure to strong solvents or high heat. If the application requires high torque transmission or outdoor weather resistance, evaluate a metal or sealed alternative.

## FAQ

### How much does the Hydroland PT-4B 4-sided white control knob cost, and is it available for purchase?

The price is 4.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 63 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 14.07.2026 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. All transactions are 100% secure and encrypted.

### 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 Hydroland 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 Hydroland 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/11717761/67099185_large.webp