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Exhibit 21

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Entity Name

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Domestic Jurisdiction

AERCO International, Inc.

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New Jersey

AHC Holding Company, Inc.

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Delaware

Apex Valves Limited

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New Zealand

Australian Valve Group Pty Ltd

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Australia

Avlis Haws do Brasil Ltda

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Brazil

Bar pneumatische steuerungssysteme GmbH

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Germany

Black Teknigas & Electro Controls Limited

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United Kingdom

BLÜCHER France SARL

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France

BLÜCHER Germany GmbH

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Germany

BLÜCHER Metal A/S

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Denmark

BLÜCHER Norway AS

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Norway

BLÜCHER Sweden AB

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Sweden

BLÜCHER UK LTD

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United Kingdom

BM Stainless Steel Drains Limited

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United Kingdom

Bradley Company, LLC

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Wisconsin

Dormont Manufacturing Company

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Pennsylvania

Electro Controls Ltd.

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United Kingdom

Enware Pty Ltd.

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Australia

Haws AG

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Switzerland

Haws Corporation

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Nevada

Haws Deutschland GmbH

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Germany

Haws India Pvt. Ltd.

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India

Haws Manufacturing Pte. Ltd.

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Singapore

Haws Middle East DWC LLC

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Dubai

HF Scientific, LLC

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Florida

I-Con Systems Holdings, LLC

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Florida

I-Con Systems, LLC

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Florida

Industrial Company for Castings and Sanitary Fittings

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Saudi Arabia

Intelligent Conservation Systems, LLC

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Florida

Intelligent Water Solutions by Watts Inc.

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Delaware

Josam Industries, LLC

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Delaware

PVI Riverside Holdings, Inc.

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Delaware

SDB IP Holdings, LLC

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Delaware

Socla Valves and Controls Iberica SA

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Spain

SteamCo Holdings, LLC

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Kansas

Superior Boiler Technologies, Inc.

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Kansas

Superior Boiler, LLC

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Kansas

Superior Equipment Holdings, LLC

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Kansas

Superior Holding, Inc.

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Kansas

Taft Engineering, Inc.

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Colorado

Tekmar Control Systems, Inc.

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Washington

Tekmar Control Systems Ltd.

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British Columbia

Traynor Family Enterprise

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Nevada

Watts (Ningbo) International Logistics Co., Ltd.

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China

Watts (Shanghai) Management Company Limited

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China

Watts Asia Pacific Sales Pte. Ltd.

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Singapore

Watts Automation – Valpes S.A.S.

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France

Watts Benelux B.V.B.A.

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Belgium

Watts Deutschland Holdings GmbH & Co KG

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Germany

Watts Electronics S.A.S.

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France

Watts EMEA Holding BV

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Netherlands

Watts Germany Holding GmbH

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Germany

Watts Heating and Hot Water Solutions LLC

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Delaware

Watts Holdings Limited

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Gibraltar


Watts Hydraulics – Socla S.A.S.

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France

Watts Industries Bulgaria EAD

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Bulgaria

Watts Industries Deutschland GmbH

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Germany

Watts Industries France S.A.S.

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France

Watts Industries Iberica S.A.

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Spain

Watts Industries Italia S.r.l.

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Italy

Watts Industries Middle East FZE

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Dubai

Watts Industries Nordic AB

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Sweden

Watts Industries Polska Sp. z.o.o.

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Poland

Watts Industries Tunisia S.A.S.

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Tunisia

Watts Industries UK Limited

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United Kingdom

Watts Intermes GmbH

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Austria

Watts Italy Holding S.r.l.

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Italy

Watts Manufacturing LLC

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Delaware

Watts Manufacturing Mexico, S. de R.L. de C.V.

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Mexico

Watts Manufacturing MX GmbH

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Switzerland

Watts Regulator Co.

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Massachusetts

Watts U.K. Ltd.

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United Kingdom

Watts Water Equipment Manufacturing (Ningbo) Co., Ltd.

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China

Watts Water Quality and Conditioning Products, LLC

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Delaware

Watts Water Technologies (Australia) Pty Ltd.

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Australia

Watts Water Technologies (Canada), Inc.

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Canada

Watts Water Technologies (HK) Holding Limited

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Hong Kong

Watts Water Technologies Latin America S.A. de C.V.

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Mexico

WWT International Holding B.V.

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Netherlands

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