How to Buy the Right Bostingner Cartridge: A Complete Guide to Fixing Shower Valve Issues

Have you ever experienced inconsistent water temperature, weak water pressure, or persistent dripping from your shower? Before you assume it’s time to replace your entire shower system, the real issue might be something much simpler — the cartridge.

At Bostingner, we want to help you identify the root cause of common shower problems and make it easy to purchase the right cartridge for your system. This guide is here to walk you through everything you need to know — from the types of cartridges to how to confirm compatibility — so you can restore your shower to perfect working condition.

Why Do You Need to Replace a Cartridge?

The cartridge is the heart of your rain shower system. It controls the water temperature, pressure, and flow direction. Just like any mechanical part, it can wear out over time due to scale buildup, aging seals, or physical damage.

Common signs your cartridge needs replacement:

• Water keeps dripping even after the valve is fully shut off
• Inconsistent water temperature — sudden shifts from hot to cold
• Controls not working properly — knobs or buttons are stuck or unresponsive
• Low water pressure or poor flow in certain modes
• Diverter switch malfunction — unable to change between shower functions
• No control over hot/cold mixing — only cold or hot water available
• Stiff or jammed controls — the valve feels rough or hard to turn

If you’re experiencing any of these issues, replacing the original cartridge is often the fastest and most reliable fix.

What Type of Bostingner Shower System Do You Have?

PS: The following content is based on the Bostingner shower system and cartridge. If you want to buy a Bostingner valve core, the premise is that your shower system is a Bostingner brand. Otherwise, it will not work in your shower system.

To find the correct Bostingner replacement cartridge, it’s important to identify which type of Bostingner shower system you have. Generally, Bostingner cartridges fall into two categories:

1. Push-Button Cartridge

Used in multi-function shower systems with push button-style controls for switching between different water outlets — such as:

• Overhead shower;
• Handheld shower;
• Shower body jets;
• Tub spout;

Common issues:

• Push button gets stuck or doesn’t spring back;
• Can’t switch between spray modes;
• Weak or no water flow from one outlet;
• Button mechanism becomes loose or damaged;
• Shower leaking;
• Push button damage;

PS: If your push button can adjust the water flow, please let us know. It will be another push button cartridge.

Installation Video Guide for Push Button Cartridge:

2. Shower Valve Cartridge

These regulate temperature and water pressure. There are two types:

2.1. Pressure Balance Cartridge

• Function: Balances hot and cold water pressure automatically to prevent sudden temperature changes (e.g., when someone flushes a toilet);
• Common issues: Stiff handle, poor temperature control, fluctuating water pressure, valve won't shut off, shower leak, cartridge damage;

Purchase Link：

https://bostingner.com/products/valve-cartridge-for-pressure-balance-shower-system

Installation Video Guide for Pressure Balance Cartridge:

2.2. Thermostatic Cartridge

• Function: Precisely maintains your desired temperature for a comfortable shower;
• Common issues: Temperature control not working, water temp drifting, handle won't respond, shower leak, cartridge damage;

Purchase Link：

https://bostingner.com/products/cartridge-for-thermostatic-shower-valve

Installation Video Guide for Thermostatic Cartridge:

What You Need to Know Before Buying a Bostingner Cartridge

To avoid purchasing the wrong part, here are a few things you should confirm:

1. Bostingner cartridges are not universal

Our cartridges are designed exclusively for Bostingner systems. They are not compatible with products from other brands, even if the fittings look similar.

2. We need gather the following before ordering:

Please send the following information via email to sale@bostingner.com so that we can confirm that you have purchased the correct cartridge.

• Order ID: Helps confirm purchase history and product source;
  
• Product SKU or model number:  e.g., BST19008LS, NER2202LS;
  
• Issue Description: e.g., leaking, poor temperature control, stuck button;

3. Helpful extras to speed up support:

• Photos of the control panel or inside the valve body;
• Video clips showing the problem (e.g., dripping water, stuck controls);

Sharing these details will help our customer support team quickly recommend the exact cartridge you need — saving you time and frustration.

Buying the right cartridge doesn’t just solve your immediate problem — it also ensures your shower set continues to run safely and comfortably for years to come.

Still unsure which cartridge is right for your shower? Please contact us via sale@bostingner.com and we will reply you once we receive your message asap.