Watts Water (WTS) 8-K To the “Adjusted” Non-gaap Excluding the Effect of Adjustments for Special Items

Exhibit 99.1

RETROSPECTIVE REVISION

RETROSPECTIVE ALLOCATION OF CORPORATE COSTS TO THE RECONCILIATION OF GAAP “AS REPORTED”

TO THE “ADJUSTED” NON-GAAP EXCLUDING THE EFFECT OF ADJUSTMENTS FOR SPECIAL ITEMS

(Amounts in millions)

(Unaudited)

SEGMENT INFORMATION

	First Quarter Ended
	March 31, 2013
	Americas			EMEA		Asia- Pacific		Corporate		Total
Net sales	$	213.0		139.2		6.7		—		358.9
As previously reported
Operating income - GAAP	$	24.0		10.9		2.9		(9.2	)	28.6
Operating margin %	11.3		%	7.8	%	43.3	%			8.0	%
Adjustments for special items	$	0.2		2.0		—		—		2.2
Operating income - as adjusted	$	24.2		12.9		2.9		(9.2	)	30.8
Adjusted operating margin %	11.4		%	9.3	%	43.3	%			8.6	%
Allocation of Corporate costs	$	(1.9	)	—		—		1.9		—
Revised
Operating income - GAAP	$	22.1		10.9		2.9		(7.3	)	28.6
Operating margin %	10.4		%	7.8	%	43.3	%			8.0	%
Operating income - as adjusted	$	22.3		12.9		2.9		(7.3	)	30.8
Adjusted operating margin %	10.5		%	9.3	%	43.3	%			8.6	%

	Second Quarter Ended											Six Months Ended
	June 30, 2013											June 30, 2013
	Americas			EMEA		Asia- Pacific		Corporate		Total		Americas			EMEA		Asia- Pacific		Corporate		Total
Net sales	$	224.4		134.1		8.3		—		366.8		$	437.4		273.3		15.0		—		725.7
As previously reported
Operating income - GAAP	$	31.5		9.8		2.4		(8.1	)	35.6		$	55.5		20.7		5.3		(17.3	)	64.2
Operating margin %	14.0		%	7.3	%	28.9	%			9.7	%	12.7		%	7.6	%	35.3	%			8.8	%
Adjustments for special items	$	0.1		1.9		—		—		2.0		$	0.3		3.9		—		—		4.2
Operating income - as adjusted	$	31.6		11.7		2.4		(8.1	)	37.6		$	55.8		24.6		5.3		(17.3	)	68.4
Adjusted operating margin %	14.1		%	8.7	%	28.9	%			10.3	%	12.8		%	9.0	%	35.3	%			9.4	%
Allocation of Corporate costs	$	(0.8	)	—		—		0.8		—		$	(2.7	)	—		—		2.7		—
Revised
Operating income - GAAP	$	30.7		9.8		2.4		(7.3	)	35.6		$	52.8		20.7		5.3		(14.6	)	64.2
Operating margin %	13.7		%	7.3	%	28.9	%			9.7	%	12.1		%	7.6	%	35.3	%			8.8	%
Operating income - as adjusted	$	30.8		11.7		2.4		(7.3	)	37.6		$	53.1		24.6		5.3		(14.6	)	68.4
Adjusted operating margin %	13.7		%	8.7	%	28.9	%			10.3	%	12.1		%	9.0	%	35.3	%			9.4	%

RETROSPECTIVE ALLOCATION OF CORPORATE COSTS TO THE RECONCILIATION OF GAAP “AS REPORTED”

TO THE “ADJUSTED” NON-GAAP EXCLUDING THE EFFECT OF ADJUSTMENTS FOR SPECIAL ITEMS

(Amounts in millions)

(Unaudited)

SEGMENT INFORMATION

	Third Quarter Ended											Nine Months Ended
	September 29, 2013											September 29, 2013
	Americas			EMEA		Asia- Pacific		Corporate		Total		Americas			EMEA		Asia- Pacific		Corporate		Total
Net sales	$	220.5		142.7		8.6		—		371.8		$	657.9		416.0		23.6		—		1,097.5
As previously reported
Operating income - GAAP	$	23.5		13.4		2.0		(8.7	)	30.2		$	79.0		34.1		7.3		(26.0	)	94.4
Operating margin %	10.7		%	9.4	%	23.3	%			8.1	%	12.0		%	8.2	%	30.9	%			8.6	%
Adjustments for special items	$	1.2		3.0		—		0.5		4.7		$	1.5		6.9		—		0.5		8.9
Operating income - as adjusted	$	24.7		16.4		2.0		(8.2	)	34.9		$	80.5		41.0		7.3		(25.5	)	103.3
Adjusted operating margin %	11.2		%	11.5	%	23.3	%			9.4	%	12.2		%	9.9	%	30.9	%			9.4	%
Allocation of Corporate costs	$	(2.0	)	—		—		2.0		—		$	(4.7	)	—		—		4.7		—
Revised
Operating income - GAAP	$	21.5		13.4		2.0		(6.7	)	30.2		$	74.3		34.1		7.3		(21.3	)	94.4
Operating margin %	9.8		%	9.4	%	23.3	%			8.1	%	11.3		%	8.2	%	30.9	%			8.6	%
Operating income - as adjusted	$	22.7		16.4		2.0		(6.2	)	34.9		$	75.8		41.0		7.3		(20.8	)	103.3
Adjusted operating margin %	10.3		%	11.5	%	23.3	%			9.4	%	11.5		%	9.9	%	30.9	%			9.4	%
	Fourth Quarter Ended											Year Ended
	December 31, 2013											December 31, 2013
	Americas			EMEA		Asia- Pacific		Corporate		Total		Americas			EMEA		Asia- Pacific		Corporate		Total
Net sales	$	220.6		146.2		9.2		—		376.0		$	878.5		562.2		32.8		—		1,473.5
As previously reported
Operating income - GAAP	$	11.4		12.8		2.4		(9.5	)	17.1		$	90.4		46.9		9.7		(35.5	)	111.5
Operating margin %	5.2		%	8.8	%	26.1	%			4.5	%	10.3		%	8.3	%	29.6	%			7.6	%
Adjustments for special items	$	15.8		3.5		(0.6	)	0.9		19.6		$	17.5		10.4		(0.6	)	1.4		28.7
Operating income - as adjusted	$	27.2		16.3		1.8		(8.6	)	36.7		$	107.9		57.3		9.1		(34.1	)	140.2
Adjusted operating margin %	12.3		%	11.1	%	19.6	%			9.8	%	12.3		%	10.2	%	27.7	%			9.5	%
Allocation of Corporate costs	$	(1.7	)	—		—		1.7		—		$	(6.4	)	—		—		6.4		—
Revised
Operating income - GAAP	$	9.7		12.8		2.4		(7.8	)	17.1		$	84.0		46.9		9.7		(29.1	)	111.5
Operating margin %	4.4		%	8.8	%	26.1	%			4.5	%	9.6		%	8.3	%	29.6	%			7.6	%
Operating income - as adjusted	$	25.5		16.3		1.8		(6.9	)	36.7		$	101.5		57.3		9.1		(27.7	)	140.2
Adjusted operating margin %	11.6		%	11.1	%	19.6	%			9.8	%	11.6		%	10.2	%	27.7	%			9.5	%

RETROSPECTIVE ALLOCATION OF CORPORATE COSTS TO THE RECONCILIATION OF GAAP “AS REPORTED”

TO THE “ADJUSTED” NON-GAAP EXCLUDING THE EFFECT OF ADJUSTMENTS FOR SPECIAL ITEMS

(Amounts in millions)

(Unaudited)

SEGMENT INFORMATION

	Year Ended
	December 31, 2012
	Americas			EMEA		Asia- Pacific		Corporate		Total
Net sales	$	835.0		565.6		26.8		—		1,427.4
As previously reported
Operating income - GAAP	$	96.5		52.5		6.5		(32.2	)	123.3
Operating margin %	11.6		%	9.3	%	24.3	%			8.6	%
Adjustments for special items	$	6.0		4.2		1.3		2.2		13.7
Operating income - as adjusted	$	102.5		56.7		7.8		(30.0	)	137.0
Adjusted operating margin %	12.3		%	10.0	%	29.1	%			9.6	%
Allocation of Corporate costs	$	(5.8	)	—		—		5.8		—
Revised
Operating income - GAAP	$	90.7		52.5		6.5		(26.4	)	123.3
Operating margin %	10.9		%	9.3	%	24.3	%			8.6	%
Operating income - as adjusted	$	96.7		56.7		7.8		(24.2	)	137.0
Adjusted operating margin %	11.6		%	10.0	%	29.1	%			9.6	%