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Siphon Break Valve 1/2" BSP Male to 3/8" BSP Female
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Maestrini Brass Siphon Break Valve (1/2" BSP Male / 3/8" BSP Female)

Part No. 410023

£14.66 You pay £14.66 Incl VAT You pay £12.22 Excl VAT

RRP £15.43 £12.86

Save £0.77 (5.0%) Save £0.64 (5.0%)

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Overview
Brand Maestrini
Country of Origin Italy
Construction Brass With Rubber Ball
Connections Male Port: 1/2" BSP, Female Port: 3/8" BSP
Pressure Rating 580 PSI (40 Bar)
Description

This Maestrini siphon break valve is made from brass. It is used to operate anti-siphon loops (41001+) typically on board boats where equipment is installed below the waterline, such as engine intakes, wet exhausts and marine toilet systems.

The valve is fitted with a check ball to prevent siphoning from taking place and a pin to minimise ball rotation.

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FAQ & Technical Information

  • How can I identify the correct BSP / NPT size fittings that I require? +

    Please refer to this useful guide:

    BSP / NPT Identification

  • How many threads per inch do your fittings have? +

    Our fittings come with standard BSP or NPT threads and therefore have a set number of threads per inch depending on the size of the pipe fitting. Please see below for our helpful guide:

    Nominal Pipe Size

    Threads per Inch

    NPT

    BSP

    1/16"

    27

    -

    1/8"

    27

    28

    1/4"

    18

    19

    3/8"

    18

    19

    1/2"

    14

    14

    3/4"

    14

    14

    1"

    11-1/2

    11

    1-1/4"

    11-1/2

    11

    1-1/2"

    11-1/2

    11

    2"

    11-1/2

    11

    2-1/2"

    8

    11

    3"

    8

    11

    3-1/2"

    8

    11

    4"

    8

    11

    5"

    8

    11

    6"

    8

    11

    8"

    8

    11

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