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Siphon Break Valve 1" BSP Male, 3/4" Female (Brass)
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Maestrini Brass Siphon Break Valve (1" BSP Male / 3/4" BSP Female)

Part No. 410025

€29.53 You pay €29.53 Incl VAT You pay €24.61 Excl VAT

RRP €32.81 €27.34

Save €3.28 (10.0%) Save €2.73 (10.0%)

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Overview
Brand Maestrini
Country of Origin Italy
Construction Brass with rubber ball
Connections Male Port: 1", Female Port: 3/4"
Description

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

Can be used in conjunction with BSP plumbing fittings to make an anti-siphon device, for example a 407105 1" BSP T piece, two 407045 BSP elbows and then two hose tails to connect the hose (404054, 404057). Larger sizes can also be made, by using adaptor bushings with larger T pieces.

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

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FAQ's

  • 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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