METHVEN Maku - User Manual

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Summary

Technical Specifications

Operating Pressure Requirements

Details minimum and maximum pressure for unequal and equal systems.

Operating Temperature Guidelines

Specifies safe minimum and maximum hot and cold water temperatures.

Inlet Connection Standard

Information on the standard connection size for water inlets.

General Installation Advice

Installation Best Practices

Recommendations for professional installation, flushing, filters, and leak checks.

Component Identification

Diagram illustrating the different parts of the shower mixer assembly.

Jet Selection and Installation Steps

Jet Selection Guide

Table and guidance for selecting the correct nozzle based on water pressure.

Step-by-Step Installation

Detailed instructions for mounting, connecting, and assembling the mixer.

Care and Cleaning

Cleaning Instructions

How to clean the shower mixer using safe methods and materials.

Warranty and Support

Details about product warranty, regional regulations, and customer service.

The MAKU SHOWER MIXER WITH FASTFLOW II is a plumbing fixture designed for controlling water flow and temperature in shower systems. This installation guide provides comprehensive details for its proper setup, operation, and maintenance, ensuring optimal performance and longevity.

Function Description

The MAKU Shower Mixer is a single-lever mixer that allows users to easily adjust both water temperature and flow rate. It is designed to work with both unequal and equal pressure water supply systems, offering versatility for various plumbing setups. The mixer incorporates a ceramic cartridge, which is a key component for smooth operation and durability, controlling the mixing of hot and cold water. The Fastflow II designation suggests an optimized internal design for efficient water delivery. The device includes a handle for user interaction, a faceplate and faceplate cover for aesthetic finish and protection, and a mixer body assembly that houses the internal components. Nozzles are also included, which can be selected based on the specific pressure system to ensure correct water delivery.

Important Technical Specifications

Operating Pressure:
- Unequal Pressure:
  - Hot: Minimum 17 kPa
  - Cold: Minimum 300 kPa
- Equal Pressure:
  - Minimum 35 kPa
- Pressure Limiting Valve: If the supply pressure exceeds 500 kPa, a pressure limiting valve must be installed to protect the mixer from damage and ensure safe operation.
Operating Temperature:
- Hot: Minimum 55°C (at mixer), Maximum 80°C
- Cold: Minimum 5°C
- Note: For uncontrolled heating systems (e.g., wet-backs or solar heating units), a suitable tempering valve is recommended to prevent scalding and ensure a safe water temperature, especially for personal hygiene outlets.
Inlet Connections: All inlet connections are 1/2" BSP (British Standard Pipe), ensuring compatibility with standard plumbing fittings.
Nozzle Selection: The guide provides a table for selecting the appropriate primary nozzle based on the hot water pressure for unequal pressure systems:
- 17-25 kPa Hot Pressure: Black Nozzle
- 25-50 kPa Hot Pressure: Green Nozzle
- 50-90 kPa Hot Pressure: Yellow Nozzle
- 90-130 kPa Hot Pressure: Red Nozzle
- For equal pressure systems, the mixer is fitted as supplied.
Mounting Dimensions: The wall lining hole should be approximately 100mm ±2 in diameter. The allowable distance from the front of the horizontal support to the finished wall surface is:
- With spacer: 4 - 29mm
- Without spacer: 10 - 35mm

Usage Features

The MAKU Shower Mixer is designed for straightforward operation and installation.

Ease of Control: The single handle allows for intuitive control of both water temperature and flow.
Installation Flexibility: It can be installed in both thin wall linings (e.g., acrylic showers) and thicker wall linings (e.g., tiles), with clear instructions provided for each scenario regarding spacer usage and mounting bracket positioning.
Secure Mounting: The mixer body is secured to a horizontal support using screws, ensuring a stable and square installation.
Waterproof Seal: Emphasis is placed on achieving a waterproof seal between the product and the mounting surface, with silicone recommended if there is any doubt about the seal quality.
Nozzle Customization: The ability to select different nozzles based on hot water pressure in unequal pressure systems allows for optimized performance and water delivery tailored to specific plumbing conditions.

Maintenance Features

Proper maintenance is crucial for the longevity and performance of the MAKU Shower Mixer.

Pre-Installation Flushing: All pipework must be thoroughly flushed prior to installation to remove any debris that could damage the ceramic cartridge.
In-line Filters: In-line filters are required on both hot and cold supplies to prevent foreign particles from damaging the ceramic cartridge, highlighting the importance of clean water supply.
Leak Checks: After installation, all connections must be checked for leaks to prevent water damage and ensure proper sealing.
Cartridge Access: The design allows for access to the ceramic cartridge for nozzle fitment or potential replacement by removing the dome cover and lock nut. The cartridge should be pulled straight out without twisting.
Cleaning:
- Never use abrasives or abrasive cleaning agents, as these can damage the finish.
- Clean regularly with contamination-free warm soapy water and a damp soft cloth. This gentle cleaning method helps preserve the aesthetic appearance and surface integrity of the mixer.

General Recommendations:

Methven strongly recommends that this product be installed by a licensed plumber to ensure compliance with all relevant regional regulations and to validate the warranty.
Regional specific regulations apply and may affect the warranty. Customers are advised to refer to the warranty statement at www.methven.com or contact customer service for full details.